diff --git a/src/AppFrame.cpp b/src/AppFrame.cpp
index e37101d..7970462 100644
--- a/src/AppFrame.cpp
+++ b/src/AppFrame.cpp
@@ -88,10 +88,10 @@ AppFrame::AppFrame() :
     wxBoxSizer *demodScopeTray = new wxBoxSizer(wxVERTICAL);
     wxBoxSizer *demodTunerTray = new wxBoxSizer(wxHORIZONTAL);
 
-    std::vector<int> attribList = { WX_GL_RGBA, WX_GL_DOUBLEBUFFER, 0 };
-    //wxGLAttributes attribList;
-    //attribList.PlatformDefaults().RGBA().DoubleBuffer().EndList();
-    //attribList.PlatformDefaults().MinRGBA(8, 8, 8, 8).DoubleBuffer().Depth(16).EndList();
+    // OpenGL settings:
+    //deprecated format: std::vector<int> attribList = { WX_GL_RGBA, WX_GL_DOUBLEBUFFER, 0 };
+    wxGLAttributes attribList;
+    attribList.PlatformDefaults().RGBA().MinRGBA(8, 8, 8, 8).DoubleBuffer().EndList();
 
     mainSplitter = new wxSplitterWindow( this, wxID_MAIN_SPLITTER, wxDefaultPosition, wxDefaultSize, wxSP_3DSASH | wxSP_LIVE_UPDATE );
     mainSplitter->SetSashGravity(10.0f / 37.0f);
diff --git a/src/CubicSDR.cpp b/src/CubicSDR.cpp
index 495bbcc..5af6d81 100644
--- a/src/CubicSDR.cpp
+++ b/src/CubicSDR.cpp
@@ -206,6 +206,14 @@ CubicSDR::CubicSDR() : frequency(0), offset(0), ppm(0), snap(1), sampleRate(DEFA
         shuttingDown.store(false);
         fdlgTarget = FrequencyDialog::FDIALOG_TARGET_DEFAULT;
         stoppedDev = nullptr;
+
+        //set OpenGL configuration:
+        m_glContextAttributes = new wxGLContextAttrs();
+        
+        wxGLContextAttrs glSettings;
+        glSettings.PlatformDefaults().EndList();
+
+        *m_glContextAttributes = glSettings;
 }
 
 bool CubicSDR::OnInit() {
@@ -495,13 +503,18 @@ int CubicSDR::OnExit() {
 PrimaryGLContext& CubicSDR::GetContext(wxGLCanvas *canvas) {
     PrimaryGLContext *glContext;
     if (!m_glContext) {
-        m_glContext = new PrimaryGLContext(canvas, NULL);
+        m_glContext = new PrimaryGLContext(canvas, NULL, GetContextAttributes());
     }
     glContext = m_glContext;
 
     return *glContext;
 }
 
+wxGLContextAttrs* CubicSDR::GetContextAttributes() {
+   
+    return m_glContextAttributes;
+}
+
 void CubicSDR::OnInitCmdLine(wxCmdLineParser& parser) {
     parser.SetDesc (commandLineInfo);
     parser.SetSwitchChars (wxT("-"));
diff --git a/src/CubicSDR.h b/src/CubicSDR.h
index d097829..6d278f1 100644
--- a/src/CubicSDR.h
+++ b/src/CubicSDR.h
@@ -71,6 +71,7 @@ public:
     CubicSDR();
 
     PrimaryGLContext &GetContext(wxGLCanvas *canvas);
+    wxGLContextAttrs* GetContextAttributes();
 
     virtual bool OnInit();
     virtual int OnExit();
@@ -94,9 +95,7 @@ public:
 
     void setAntennaName(const std::string& name);
     const std::string& getAntennaName();
-    
-    void setDBOffset(int ofs);
-    int getDBOffset();
+   
 
     void setSampleRate(long long rate_in);
     long long getSampleRate();
@@ -114,7 +113,7 @@ public:
     DemodulatorThreadOutputQueuePtr getAudioVisualQueue();
     DemodulatorThreadInputQueuePtr getIQVisualQueue();
     DemodulatorThreadInputQueuePtr getWaterfallVisualQueue();
-    DemodulatorThreadInputQueuePtr getActiveDemodVisualQueue();
+    
     DemodulatorMgr &getDemodMgr();
     BookmarkMgr &getBookmarkMgr();
 
@@ -186,6 +185,8 @@ private:
     AppFrame *appframe = nullptr;
     AppConfig config;
     PrimaryGLContext *m_glContext = nullptr;
+    wxGLContextAttrs *m_glContextAttributes = nullptr;
+
     std::vector<SDRDeviceInfo *> *devs = nullptr;
 
     DemodulatorMgr demodMgr;
diff --git a/src/forms/Bookmark/BookmarkView.cpp b/src/forms/Bookmark/BookmarkView.cpp
index cfe73aa..60a2a4d 100644
--- a/src/forms/Bookmark/BookmarkView.cpp
+++ b/src/forms/Bookmark/BookmarkView.cpp
@@ -186,10 +186,14 @@ void BookmarkView::onUpdateTimer( wxTimerEvent& /* event */ ) {
         if (bmSel) {
             m_treeView->SelectItem(bmSel);
         }  
-        doUpdateBookmarks.store(false);
+        doUpdateBookmarks.store(false);  
     }
 }
 
+bool BookmarkView::skipUserEvents() {
+
+    return !this->IsShown() || doUpdateActive || doUpdateBookmarks;
+}
 
 void BookmarkView::updateTheme() {
     wxColour bgColor(ThemeMgr::mgr.currentTheme->generalBackground);
@@ -538,6 +542,11 @@ void BookmarkView::onTreeActivate( wxTreeEvent& event ) {
 
 
 void BookmarkView::onTreeCollapse( wxTreeEvent& event ) {
+    
+    if (skipUserEvents()) {
+        return;
+    }
+
     bool searchState = (searchKeywords.size() != 0);
     
     if (searchState) {
@@ -567,6 +576,11 @@ void BookmarkView::onTreeCollapse( wxTreeEvent& event ) {
 
 
 void BookmarkView::onTreeExpanded( wxTreeEvent& event ) {
+
+    if (skipUserEvents()) {
+        return;
+    }
+
     bool searchState = (searchKeywords.size() != 0);
     
     if (searchState) {
@@ -596,6 +610,7 @@ void BookmarkView::onTreeExpanded( wxTreeEvent& event ) {
 
 
 void BookmarkView::onTreeItemMenu( wxTreeEvent& /* event */ ) {
+
     if (m_treeView->GetSelection() == bookmarkBranch) {
         wxMenu menu;
         menu.Append(wxCONTEXT_ADD_GROUP_ID, BOOKMARK_VIEW_STR_ADD_GROUP);
@@ -606,6 +621,7 @@ void BookmarkView::onTreeItemMenu( wxTreeEvent& /* event */ ) {
 
 
 void BookmarkView::onMenuItem(wxCommandEvent& event) {
+
     if (event.GetId() == wxCONTEXT_ADD_GROUP_ID) {
         onAddGroup(event);
     }
@@ -683,10 +699,13 @@ wxButton *BookmarkView::makeButton(wxWindow *parent, std::string labelVal, wxObj
     nButton->Connect( wxEVT_COMMAND_BUTTON_CLICKED, handler, nullptr, this);
     
     wxColour bgColor(ThemeMgr::mgr.currentTheme->generalBackground);
-    wxColour textColor(ThemeMgr::mgr.currentTheme->text);
+   // wxColour fgColor(ThemeMgr::mgr.currentTheme->button);
+    //Force white color:
+    wxColour textColorWhite(RGBA4f(255,255,255));
 
     nButton->SetBackgroundColour(bgColor);
-    nButton->SetForegroundColour(textColor);
+    nButton->SetForegroundColour(textColorWhite);
+
     return nButton;
 }
 
@@ -762,7 +781,7 @@ void BookmarkView::addBookmarkChoice(wxWindow *parent) {
 
 
 void BookmarkView::onBookmarkChoice( wxCommandEvent & /* event */ ) {
-
+   
     TreeViewItem *tvi = itemToTVI(m_treeView->GetSelection());
     
     int numSel = bookmarkChoice->GetCount();
@@ -823,15 +842,16 @@ void BookmarkView::activeSelection(DemodulatorInstancePtr dsel) {
 
     addBookmarkChoice(m_buttonPanel);
     
-    if (dsel->isActive() && !(dsel->isRecording())) {
-        addButton(m_buttonPanel, "Start Recording", wxCommandEventHandler( BookmarkView::onStartRecording ));
-    } else {
-        addButton(m_buttonPanel, "Stop Recording", wxCommandEventHandler( BookmarkView::onStopRecording ));
+    if (dsel->isActive()) {
+        if (!(dsel->isRecording())) {
+            addButton(m_buttonPanel, "Start Recording", wxCommandEventHandler(BookmarkView::onStartRecording));
+        } else {
+            addButton(m_buttonPanel, "Stop Recording", wxCommandEventHandler(BookmarkView::onStopRecording));
+        }
     }
 
     addButton(m_buttonPanel, "Remove Active", wxCommandEventHandler( BookmarkView::onRemoveActive ));
     
-    
     showProps();
     showButtons();
     refreshLayout();
@@ -1053,6 +1073,7 @@ void BookmarkView::activeBranchSelection() {
 
 
 void BookmarkView::onTreeSelect( wxTreeEvent& event ) {
+
     wxTreeItemId itm = event.GetItem();
     TreeViewItem* tvi = dynamic_cast<TreeViewItem*>(m_treeView->GetItemData(itm));
 
@@ -1097,11 +1118,17 @@ void BookmarkView::onTreeSelect( wxTreeEvent& event ) {
 
 
 void BookmarkView::onTreeSelectChanging( wxTreeEvent& event ) {
+
+    if (skipUserEvents()) {
+        return;
+    }
+
     event.Skip();
 }
 
 
 void BookmarkView::onLabelText( wxCommandEvent& /* event */ ) {
+
     std::wstring newLabel = m_labelText->GetValue().ToStdWstring();
     TreeViewItem *curSel = itemToTVI(m_treeView->GetSelection());
     
@@ -1146,6 +1173,7 @@ void BookmarkView::onDoubleClickFreq( wxMouseEvent& /* event */ ) {
 
 
 void BookmarkView::onDoubleClickBandwidth( wxMouseEvent& /* event */ ) {
+    
     TreeViewItem *curSel = itemToTVI(m_treeView->GetSelection());
 
     if (curSel && curSel->type == TreeViewItem::TREEVIEW_ITEM_TYPE_ACTIVE) {
@@ -1157,6 +1185,7 @@ void BookmarkView::onDoubleClickBandwidth( wxMouseEvent& /* event */ ) {
 
 
 void BookmarkView::onRemoveActive( wxCommandEvent& /* event */ ) {
+
     TreeViewItem *curSel = itemToTVI(m_treeView->GetSelection());
 
     if (curSel && curSel->type == TreeViewItem::TREEVIEW_ITEM_TYPE_ACTIVE) {
@@ -1168,6 +1197,7 @@ void BookmarkView::onRemoveActive( wxCommandEvent& /* event */ ) {
 }
 
 void BookmarkView::onStartRecording( wxCommandEvent& /* event */ ) {
+
     TreeViewItem *curSel = itemToTVI(m_treeView->GetSelection());
     
     if (curSel && curSel->type == TreeViewItem::TREEVIEW_ITEM_TYPE_ACTIVE) {
@@ -1180,6 +1210,7 @@ void BookmarkView::onStartRecording( wxCommandEvent& /* event */ ) {
 
 
 void BookmarkView::onStopRecording( wxCommandEvent& /* event */ ) {
+
     TreeViewItem *curSel = itemToTVI(m_treeView->GetSelection());
     
     if (curSel && curSel->type == TreeViewItem::TREEVIEW_ITEM_TYPE_ACTIVE) {
@@ -1193,6 +1224,7 @@ void BookmarkView::onStopRecording( wxCommandEvent& /* event */ ) {
 
 
 void BookmarkView::onRemoveBookmark( wxCommandEvent& /* event */ ) {
+
     if (editingLabel) {
         return;
     }
@@ -1206,6 +1238,7 @@ void BookmarkView::onRemoveBookmark( wxCommandEvent& /* event */ ) {
 
 
 void BookmarkView::onActivateBookmark( wxCommandEvent& /* event */ ) {
+
     TreeViewItem *curSel = itemToTVI(m_treeView->GetSelection());
 
     if (curSel && curSel->type == TreeViewItem::TREEVIEW_ITEM_TYPE_BOOKMARK) {
@@ -1215,6 +1248,7 @@ void BookmarkView::onActivateBookmark( wxCommandEvent& /* event */ ) {
 
 
 void BookmarkView::onActivateRecent( wxCommandEvent& /* event */ ) {
+
     TreeViewItem *curSel = itemToTVI(m_treeView->GetSelection());
     
     if (curSel && curSel->type == TreeViewItem::TREEVIEW_ITEM_TYPE_RECENT) {
@@ -1230,6 +1264,7 @@ void BookmarkView::onActivateRecent( wxCommandEvent& /* event */ ) {
 
 
 void BookmarkView::onRemoveRecent ( wxCommandEvent& /* event */ ) {
+
     if (editingLabel) {
         return;
     }
@@ -1247,6 +1282,7 @@ void BookmarkView::onRemoveRecent ( wxCommandEvent& /* event */ ) {
 }
 
 void BookmarkView::onClearRecents ( wxCommandEvent& /* event */ ) {
+
     if (editingLabel) {
         return;
     }
@@ -1255,6 +1291,7 @@ void BookmarkView::onClearRecents ( wxCommandEvent& /* event */ ) {
 
 
 void BookmarkView::onAddGroup( wxCommandEvent& /* event */ ) {
+
     wxString stringVal = wxGetTextFromUser(BOOKMARK_VIEW_STR_ADD_GROUP_DESC, BOOKMARK_VIEW_STR_ADD_GROUP, "");
     if (stringVal.ToStdString() != "") {
         wxGetApp().getBookmarkMgr().addGroup(stringVal.ToStdString());
@@ -1264,6 +1301,7 @@ void BookmarkView::onAddGroup( wxCommandEvent& /* event */ ) {
 
 
 void BookmarkView::onRemoveGroup( wxCommandEvent& /* event */ ) {
+
     if (editingLabel) {
         return;
     }
@@ -1288,6 +1326,7 @@ void BookmarkView::onAddRange( wxCommandEvent& /* event */ ) {
 
 
 void BookmarkView::onRemoveRange( wxCommandEvent& /* event */ ) {
+
     if (editingLabel) {
         return;
     }
@@ -1301,6 +1340,7 @@ void BookmarkView::onRemoveRange( wxCommandEvent& /* event */ ) {
 
 
 void BookmarkView::onRenameRange( wxCommandEvent& /* event */ ) {
+
     TreeViewItem *curSel = itemToTVI(m_treeView->GetSelection());
     
     if (!curSel || curSel->type != TreeViewItem::TREEVIEW_ITEM_TYPE_GROUP) {
@@ -1319,6 +1359,7 @@ void BookmarkView::onRenameRange( wxCommandEvent& /* event */ ) {
 }
 
 void BookmarkView::onActivateRange( wxCommandEvent& /* event */ ) {
+
     TreeViewItem *curSel = itemToTVI(m_treeView->GetSelection());
     
     if (curSel && curSel->type == TreeViewItem::TREEVIEW_ITEM_TYPE_RANGE) {
@@ -1327,6 +1368,7 @@ void BookmarkView::onActivateRange( wxCommandEvent& /* event */ ) {
 }
 
 void BookmarkView::onUpdateRange( wxCommandEvent& /* event */ ) {
+
     TreeViewItem *curSel = itemToTVI(m_treeView->GetSelection());
     
     if (curSel && curSel->type == TreeViewItem::TREEVIEW_ITEM_TYPE_RANGE) {
@@ -1335,6 +1377,7 @@ void BookmarkView::onUpdateRange( wxCommandEvent& /* event */ ) {
 }
 
 void BookmarkView::onTreeBeginDrag( wxTreeEvent& event ) {
+
     TreeViewItem* tvi = dynamic_cast<TreeViewItem*>(m_treeView->GetItemData(event.GetItem()));
     
     dragItem = nullptr;
@@ -1439,6 +1482,10 @@ void BookmarkView::onTreeEndDrag( wxTreeEvent& event ) {
 
 void BookmarkView::onTreeItemGetTooltip( wxTreeEvent& event ) {
     
+    if (skipUserEvents()) {
+        return;
+    }
+
     event.Skip();
 }
 
@@ -1491,6 +1538,7 @@ TreeViewItem *BookmarkView::itemToTVI(wxTreeItemId item) {
 }
 
 void BookmarkView::onSearchTextFocus( wxMouseEvent&  event ) {
+
     mouseTracker.OnMouseMoved(event);
     
     //apparently needed ???
@@ -1515,6 +1563,7 @@ void BookmarkView::onSearchTextFocus( wxMouseEvent&  event ) {
 
 
 void BookmarkView::onSearchText( wxCommandEvent& event ) {
+
     std::wstring searchText = m_searchText->GetValue().Trim().Lower().ToStdWstring();
     
    searchKeywords.clear();
@@ -1545,6 +1594,7 @@ void BookmarkView::onSearchText( wxCommandEvent& event ) {
 
 
 void BookmarkView::onClearSearch( wxCommandEvent& /* event */ ) {
+
     m_clearSearchButton->Hide();
     m_searchText->SetValue(L"Search..");
     m_treeView->SetFocus();
diff --git a/src/forms/Bookmark/BookmarkView.h b/src/forms/Bookmark/BookmarkView.h
index 673012f..accb076 100644
--- a/src/forms/Bookmark/BookmarkView.h
+++ b/src/forms/Bookmark/BookmarkView.h
@@ -161,6 +161,8 @@ protected:
     void onRenameRange( wxCommandEvent& event );
     void onActivateRange( wxCommandEvent& event );
     void onUpdateRange( wxCommandEvent& event );
+
+    bool skipUserEvents();
     
     TreeViewItem *itemToTVI(wxTreeItemId item);
     
diff --git a/src/ui/UITestCanvas.cpp b/src/ui/UITestCanvas.cpp
index 9abe7df..bce7471 100644
--- a/src/ui/UITestCanvas.cpp
+++ b/src/ui/UITestCanvas.cpp
@@ -27,10 +27,10 @@ EVT_LEAVE_WINDOW(UITestCanvas::OnMouseLeftWindow)
 EVT_ENTER_WINDOW(UITestCanvas::OnMouseEnterWindow)
 wxEND_EVENT_TABLE()
 
-UITestCanvas::UITestCanvas(wxWindow *parent, std::vector<int> dispAttrs) :
+UITestCanvas::UITestCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs) :
 InteractiveCanvas(parent, dispAttrs) {
     
-    glContext = new UITestContext(this, &wxGetApp().GetContext(this));
+    glContext = new UITestContext(this, &wxGetApp().GetContext(this), wxGetApp().GetContextAttributes());
 }
 
 UITestCanvas::~UITestCanvas() {
diff --git a/src/ui/UITestCanvas.h b/src/ui/UITestCanvas.h
index 631366a..27c341e 100644
--- a/src/ui/UITestCanvas.h
+++ b/src/ui/UITestCanvas.h
@@ -17,7 +17,7 @@
 
 class UITestCanvas: public InteractiveCanvas {
 public:
-    UITestCanvas(wxWindow *parent, std::vector<int> dispAttrs);
+    UITestCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs);
     ~UITestCanvas();
     
 private:
diff --git a/src/ui/UITestContext.cpp b/src/ui/UITestContext.cpp
index e8cdd17..ac91d0e 100644
--- a/src/ui/UITestContext.cpp
+++ b/src/ui/UITestContext.cpp
@@ -5,8 +5,8 @@
 #include "UITestCanvas.h"
 #include "ColorTheme.h"
 
-UITestContext::UITestContext(UITestCanvas *canvas, wxGLContext *sharedContext) :
-PrimaryGLContext(canvas, sharedContext), testMeter("TEST",0,100,50) {
+UITestContext::UITestContext(UITestCanvas *canvas, wxGLContext *sharedContext, wxGLContextAttrs *ctxAttrs) :
+PrimaryGLContext(canvas, sharedContext, ctxAttrs), testMeter("TEST",0,100,50) {
     
     testPanel.setPosition(0.0, 0.0);
     testPanel.setSize(1.0, 1.0);
diff --git a/src/ui/UITestContext.h b/src/ui/UITestContext.h
index 62ce4fa..e44b550 100644
--- a/src/ui/UITestContext.h
+++ b/src/ui/UITestContext.h
@@ -11,7 +11,7 @@ class UITestCanvas;
 
 class UITestContext: public PrimaryGLContext {
 public:
-    UITestContext(UITestCanvas *canvas, wxGLContext *sharedContext);
+    UITestContext(UITestCanvas *canvas, wxGLContext *sharedContext, wxGLContextAttrs *ctxAttrs);
     
     void DrawBegin();
     void Draw();
diff --git a/src/util/GLExt.cpp b/src/util/GLExt.cpp
index 191fbdb..6349121 100644
--- a/src/util/GLExt.cpp
+++ b/src/util/GLExt.cpp
@@ -46,7 +46,8 @@ void initGLExtensions() {
 
 #ifdef _WIN32
     if (GLExtSupported("WGL_EXT_swap_control")) {
-        std::cout << "Initializing WGL swap control extensions.." << std::endl;
+        std::cout << "Initializing WGL swap control extensions.." << std::endl << std::flush;
+
         wglSwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC) wglGetProcAddress("wglSwapIntervalEXT");
         wglGetSwapIntervalEXT = (PFNWGLGETSWAPINTERVALEXTPROC) wglGetProcAddress("wglGetSwapIntervalEXT");
 
diff --git a/src/visual/GainCanvas.cpp b/src/visual/GainCanvas.cpp
index 70010cf..8bebc74 100644
--- a/src/visual/GainCanvas.cpp
+++ b/src/visual/GainCanvas.cpp
@@ -29,10 +29,10 @@ EVT_ENTER_WINDOW(GainCanvas::OnMouseEnterWindow)
 EVT_MOUSEWHEEL(GainCanvas::OnMouseWheelMoved)
 wxEND_EVENT_TABLE()
 
-GainCanvas::GainCanvas(wxWindow *parent, std::vector<int> dispAttrs) :
+GainCanvas::GainCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs) :
         InteractiveCanvas(parent, dispAttrs) {
 
-    glContext = new PrimaryGLContext(this, &wxGetApp().GetContext(this));
+    glContext = new PrimaryGLContext(this, &wxGetApp().GetContext(this), wxGetApp().GetContextAttributes());
     bgPanel.setCoordinateSystem(GLPanel::GLPANEL_Y_UP);
     bgPanel.setFill(GLPanel::GLPANEL_FILL_GRAD_X);
 
diff --git a/src/visual/GainCanvas.h b/src/visual/GainCanvas.h
index 323724b..251c8a2 100644
--- a/src/visual/GainCanvas.h
+++ b/src/visual/GainCanvas.h
@@ -21,7 +21,7 @@
 
 class GainCanvas: public InteractiveCanvas {
 public:
-    GainCanvas(wxWindow *parent, std::vector<int> dispAttrs);
+    GainCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs);
     ~GainCanvas();
 
     void setHelpTip(std::string tip);
diff --git a/src/visual/InteractiveCanvas.cpp b/src/visual/InteractiveCanvas.cpp
index cfb9e85..b33ea18 100644
--- a/src/visual/InteractiveCanvas.cpp
+++ b/src/visual/InteractiveCanvas.cpp
@@ -20,9 +20,9 @@
 
 #include <wx/numformatter.h>
 
-InteractiveCanvas::InteractiveCanvas(wxWindow *parent, std::vector<int> dispAttrs) :
-        wxGLCanvas(parent, wxID_ANY, dispAttrs.data(), wxDefaultPosition, wxDefaultSize,
-        wxFULL_REPAINT_ON_RESIZE), parent(parent), shiftDown(false), altDown(false), ctrlDown(false), centerFreq(0), bandwidth(0), lastBandwidth(0), isView(
+InteractiveCanvas::InteractiveCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs) :
+        wxGLCanvas(parent, dispAttrs, wxID_ANY,  wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE), 
+        parent(parent), shiftDown(false), altDown(false), ctrlDown(false), centerFreq(0), bandwidth(0), lastBandwidth(0), isView(
         false) {
     mouseTracker.setTarget(this);
 }
diff --git a/src/visual/InteractiveCanvas.h b/src/visual/InteractiveCanvas.h
index 091a9f6..14bd1e7 100644
--- a/src/visual/InteractiveCanvas.h
+++ b/src/visual/InteractiveCanvas.h
@@ -12,7 +12,7 @@
 
 class InteractiveCanvas: public wxGLCanvas {
 public:
-    InteractiveCanvas(wxWindow *parent, std::vector<int> dispAttrs);
+    InteractiveCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs);
     virtual ~InteractiveCanvas();
 
     long long getFrequencyAt(float x);
diff --git a/src/visual/MeterCanvas.cpp b/src/visual/MeterCanvas.cpp
index d80b432..d18dd78 100644
--- a/src/visual/MeterCanvas.cpp
+++ b/src/visual/MeterCanvas.cpp
@@ -30,10 +30,10 @@ EVT_LEAVE_WINDOW(MeterCanvas::OnMouseLeftWindow)
 EVT_ENTER_WINDOW(MeterCanvas::OnMouseEnterWindow)
 wxEND_EVENT_TABLE()
 
-MeterCanvas::MeterCanvas(wxWindow *parent, std::vector<int> dispAttrs) :
+MeterCanvas::MeterCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs) :
         InteractiveCanvas(parent, dispAttrs), level(0), level_min(0), level_max(1), inputValue(0), userInputValue(0), showUserInput(true) {
 
-    glContext = new MeterContext(this, &wxGetApp().GetContext(this));
+    glContext = new MeterContext(this, &wxGetApp().GetContext(this), wxGetApp().GetContextAttributes());
 }
 
 MeterCanvas::~MeterCanvas() {
diff --git a/src/visual/MeterCanvas.h b/src/visual/MeterCanvas.h
index 9134d6e..1246d7d 100644
--- a/src/visual/MeterCanvas.h
+++ b/src/visual/MeterCanvas.h
@@ -17,7 +17,7 @@
 
 class MeterCanvas: public InteractiveCanvas {
 public:
-    MeterCanvas(wxWindow *parent, std::vector<int> dispAttrs);
+    MeterCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs);
     ~MeterCanvas();
 
     void setLevel(float level_in);
diff --git a/src/visual/MeterContext.cpp b/src/visual/MeterContext.cpp
index 4c33332..7e86ce7 100644
--- a/src/visual/MeterContext.cpp
+++ b/src/visual/MeterContext.cpp
@@ -5,8 +5,8 @@
 #include "MeterCanvas.h"
 #include "ColorTheme.h"
 
-MeterContext::MeterContext(MeterCanvas *canvas, wxGLContext *sharedContext) :
-        PrimaryGLContext(canvas, sharedContext) {
+MeterContext::MeterContext(MeterCanvas *canvas, wxGLContext *sharedContext, wxGLContextAttrs *ctxAttrs) :
+        PrimaryGLContext(canvas, sharedContext, ctxAttrs) {
 }
 
 void MeterContext::DrawBegin() {
diff --git a/src/visual/MeterContext.h b/src/visual/MeterContext.h
index 789ebcd..e154135 100644
--- a/src/visual/MeterContext.h
+++ b/src/visual/MeterContext.h
@@ -12,7 +12,7 @@ class MeterCanvas;
 
 class MeterContext: public PrimaryGLContext {
 public:
-    MeterContext(MeterCanvas *canvas, wxGLContext *sharedContext);
+    MeterContext(MeterCanvas *canvas, wxGLContext *sharedContext, wxGLContextAttrs *ctxAttrs);
 
     void DrawBegin();
     void Draw(float r, float g, float b, float a, float level);
diff --git a/src/visual/ModeSelectorCanvas.cpp b/src/visual/ModeSelectorCanvas.cpp
index 31c53ed..56bafae 100644
--- a/src/visual/ModeSelectorCanvas.cpp
+++ b/src/visual/ModeSelectorCanvas.cpp
@@ -27,10 +27,10 @@ EVT_LEAVE_WINDOW(ModeSelectorCanvas::OnMouseLeftWindow)
 EVT_ENTER_WINDOW(ModeSelectorCanvas::OnMouseEnterWindow)
 wxEND_EVENT_TABLE()
 
-ModeSelectorCanvas::ModeSelectorCanvas(wxWindow *parent, std::vector<int> dispAttrs) :
+ModeSelectorCanvas::ModeSelectorCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs) :
 InteractiveCanvas(parent, dispAttrs), numChoices(0), currentSelection(-1), toggleMode(false), inputChanged(false), padX(4.0), padY(4.0), highlightOverride(false) {
 
-    glContext = new ModeSelectorContext(this, &wxGetApp().GetContext(this));
+    glContext = new ModeSelectorContext(this, &wxGetApp().GetContext(this), wxGetApp().GetContextAttributes());
     
     highlightColor = RGBA4f(1.0,1.0,1.0,1.0);
 }
diff --git a/src/visual/ModeSelectorCanvas.h b/src/visual/ModeSelectorCanvas.h
index 3a0d588..4fa0abd 100644
--- a/src/visual/ModeSelectorCanvas.h
+++ b/src/visual/ModeSelectorCanvas.h
@@ -27,7 +27,7 @@ public:
 
 class ModeSelectorCanvas: public InteractiveCanvas {
 public:
-    ModeSelectorCanvas(wxWindow *parent, std::vector<int> dispAttrs);
+    ModeSelectorCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs);
     ~ModeSelectorCanvas();
 
     int getHoveredSelection();
diff --git a/src/visual/ModeSelectorContext.cpp b/src/visual/ModeSelectorContext.cpp
index 5ce3b08..8eb0005 100644
--- a/src/visual/ModeSelectorContext.cpp
+++ b/src/visual/ModeSelectorContext.cpp
@@ -6,8 +6,8 @@
 #include "ColorTheme.h"
 
 
-ModeSelectorContext::ModeSelectorContext(ModeSelectorCanvas *canvas, wxGLContext *sharedContext) :
-        PrimaryGLContext(canvas, sharedContext) {
+ModeSelectorContext::ModeSelectorContext(ModeSelectorCanvas *canvas, wxGLContext *sharedContext, wxGLContextAttrs *ctxAttrs) :
+        PrimaryGLContext(canvas, sharedContext, ctxAttrs) {
     glDisable(GL_CULL_FACE);
     glDisable(GL_DEPTH_TEST);
 
diff --git a/src/visual/ModeSelectorContext.h b/src/visual/ModeSelectorContext.h
index 8daecc0..7576853 100644
--- a/src/visual/ModeSelectorContext.h
+++ b/src/visual/ModeSelectorContext.h
@@ -12,7 +12,7 @@ class ModeSelectorCanvas;
 
 class ModeSelectorContext: public PrimaryGLContext {
 public:
-    ModeSelectorContext(ModeSelectorCanvas *canvas, wxGLContext *sharedContext);
+    ModeSelectorContext(ModeSelectorCanvas *canvas, wxGLContext *sharedContext, wxGLContextAttrs *ctxAttrs);
 
     void DrawBegin();
     void DrawSelector(std::string label, int c, int cMax, bool on, float r, float g, float b, float a, float padx, float pady);
diff --git a/src/visual/PrimaryGLContext.cpp b/src/visual/PrimaryGLContext.cpp
index cd56408..6ff20c0 100644
--- a/src/visual/PrimaryGLContext.cpp
+++ b/src/visual/PrimaryGLContext.cpp
@@ -50,8 +50,11 @@ void PrimaryGLContext::CheckGLError() {
     }
 }
 
-PrimaryGLContext::PrimaryGLContext(wxGLCanvas *canvas, wxGLContext *sharedContext) :
-        wxGLContext(canvas, sharedContext), hoverAlpha(1.0) {
+PrimaryGLContext::PrimaryGLContext(wxGLCanvas *canvas, wxGLContext *sharedContext, wxGLContextAttrs* ctxAttrs) :
+        wxGLContext(canvas, sharedContext, (const wxGLContextAttrs*) ctxAttrs), hoverAlpha(1.0) {
+
+
+
 //#ifndef __linux__
 //    SetCurrent(*canvas);
 //    // Pre-load fonts
diff --git a/src/visual/PrimaryGLContext.h b/src/visual/PrimaryGLContext.h
index a799e75..fe3ae13 100644
--- a/src/visual/PrimaryGLContext.h
+++ b/src/visual/PrimaryGLContext.h
@@ -16,7 +16,7 @@
 
 class PrimaryGLContext: public wxGLContext {
 public:
-    PrimaryGLContext(wxGLCanvas *canvas, wxGLContext *sharedContext);
+    PrimaryGLContext(wxGLCanvas *canvas, wxGLContext *sharedContext, wxGLContextAttrs* ctxAttrs);
 
     static wxString glGetwxString(GLenum name);
     static void CheckGLError();
diff --git a/src/visual/ScopeCanvas.cpp b/src/visual/ScopeCanvas.cpp
index 1f8fc80..c751814 100644
--- a/src/visual/ScopeCanvas.cpp
+++ b/src/visual/ScopeCanvas.cpp
@@ -31,9 +31,9 @@ EVT_LEAVE_WINDOW(ScopeCanvas::OnMouseLeftWindow)
 EVT_ENTER_WINDOW(ScopeCanvas::OnMouseEnterWindow)
 wxEND_EVENT_TABLE()
 
-ScopeCanvas::ScopeCanvas(wxWindow *parent, std::vector<int> dispAttrs) : InteractiveCanvas(parent, dispAttrs), ppmMode(false), ctr(0), ctrTarget(0), dragAccel(0), helpTip("") {
+ScopeCanvas::ScopeCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs) : InteractiveCanvas(parent, dispAttrs), ppmMode(false), ctr(0), ctrTarget(0), dragAccel(0), helpTip("") {
 
-    glContext = new ScopeContext(this, &wxGetApp().GetContext(this));
+    glContext = new ScopeContext(this, &wxGetApp().GetContext(this), wxGetApp().GetContextAttributes());
     inputData->set_max_num_items(2);
     bgPanel.setFill(GLPanel::GLPANEL_FILL_GRAD_Y);
     bgPanel.setSize(1.0, 0.5f);
diff --git a/src/visual/ScopeCanvas.h b/src/visual/ScopeCanvas.h
index bf16eb9..395f808 100644
--- a/src/visual/ScopeCanvas.h
+++ b/src/visual/ScopeCanvas.h
@@ -18,7 +18,7 @@
 
 class ScopeCanvas: public InteractiveCanvas {
 public:
-    ScopeCanvas(wxWindow *parent, std::vector<int> dispAttrs);
+    ScopeCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs);
     ~ScopeCanvas();
 
     //This is public because it is indeed forwarded from
diff --git a/src/visual/ScopeContext.cpp b/src/visual/ScopeContext.cpp
index f0b0a76..309fa48 100644
--- a/src/visual/ScopeContext.cpp
+++ b/src/visual/ScopeContext.cpp
@@ -6,8 +6,8 @@
 #include "ScopeCanvas.h"
 #include "ColorTheme.h"
 
-ScopeContext::ScopeContext(ScopeCanvas *canvas, wxGLContext *sharedContext) :
-        PrimaryGLContext(canvas, sharedContext) {
+ScopeContext::ScopeContext(ScopeCanvas *canvas, wxGLContext *sharedContext, wxGLContextAttrs *ctxAttrs) :
+        PrimaryGLContext(canvas, sharedContext, ctxAttrs) {
     glDisable (GL_CULL_FACE);
     glDisable (GL_DEPTH_TEST);
 
diff --git a/src/visual/ScopeContext.h b/src/visual/ScopeContext.h
index b4860d9..1b0030c 100644
--- a/src/visual/ScopeContext.h
+++ b/src/visual/ScopeContext.h
@@ -12,7 +12,7 @@ class ScopeCanvas;
 
 class ScopeContext: public PrimaryGLContext {
 public:
-    ScopeContext(ScopeCanvas *canvas, wxGLContext *sharedContext);
+    ScopeContext(ScopeCanvas *canvas, wxGLContext *sharedContext, wxGLContextAttrs *ctxAttrs);
 
     void DrawBegin(bool clear=true);
     void DrawTunerTitles(bool ppmMode=false);
diff --git a/src/visual/SpectrumCanvas.cpp b/src/visual/SpectrumCanvas.cpp
index 4630f9b..9fb7e23 100644
--- a/src/visual/SpectrumCanvas.cpp
+++ b/src/visual/SpectrumCanvas.cpp
@@ -32,10 +32,10 @@ EVT_RIGHT_DOWN(SpectrumCanvas::OnMouseRightDown)
 EVT_RIGHT_UP(SpectrumCanvas::OnMouseRightReleased)
 wxEND_EVENT_TABLE()
 
-SpectrumCanvas::SpectrumCanvas(wxWindow *parent, std::vector<int> dispAttrs) :
+SpectrumCanvas::SpectrumCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs) :
         InteractiveCanvas(parent, dispAttrs), waterfallCanvas(NULL) {
 
-    glContext = new PrimaryGLContext(this, &wxGetApp().GetContext(this));
+    glContext = new PrimaryGLContext(this, &wxGetApp().GetContext(this), wxGetApp().GetContextAttributes());
 
     visualDataQueue->set_max_num_items(1);
             
@@ -215,6 +215,21 @@ void SpectrumCanvas::updateScaleFactor(float factor) {
     wp->setScaleFactor(factor);
 }
 
+void SpectrumCanvas::updateScaleFactorFromYMove(float yDeltaMouseMove) {
+
+    scaleFactor += yDeltaMouseMove * 2.0;
+
+    if (scaleFactor < 0.25) {
+        scaleFactor = 0.25;
+    }
+    if (scaleFactor > 10.0) {
+        scaleFactor = 10.0;
+    }
+
+    resetScaleFactor = false;
+    updateScaleFactor(scaleFactor);
+}
+
 void SpectrumCanvas::OnMouseMoved(wxMouseEvent& event) {
     InteractiveCanvas::OnMouseMoved(event);
     if (mouseTracker.mouseDown()) {
@@ -226,21 +241,11 @@ void SpectrumCanvas::OnMouseMoved(wxMouseEvent& event) {
     }
     else if (scaleFactorEnabled && mouseTracker.mouseRightDown()) {
         
-        float yDelta = mouseTracker.getDeltaMouseY();
+        updateScaleFactorFromYMove(mouseTracker.getDeltaMouseY());
 
-        scaleFactor += yDelta*2.0;
-        if (scaleFactor < 0.25) {
-            scaleFactor = 0.25;
-        }
-        if (scaleFactor > 10.0) {
-            scaleFactor = 10.0;
-        }
-        
-        resetScaleFactor = false;
-        updateScaleFactor(scaleFactor);
     } else {
         if (scaleFactorEnabled) {
-            setStatusText("Drag horizontal to adjust center frequency. Right-drag or SHIFT+UP/DOWN to adjust vertical scale; right-click to reset. 'B' to toggle decibels display.");
+            setStatusText("Drag horizontal to adjust center frequency. Arrow keys or wheel to navigate/zoom bandwith. Right-drag or SHIFT+UP/DOWN to adjust visual gain, right-click to reset it. 'B' to toggle decibels display.");
         } else {
             setStatusText("Displaying spectrum of active demodulator.");
         }
@@ -248,9 +253,9 @@ void SpectrumCanvas::OnMouseMoved(wxMouseEvent& event) {
 }
 
 void SpectrumCanvas::OnMouseDown(wxMouseEvent& event) {
+    SetCursor(wxCURSOR_SIZEWE);
 	mouseTracker.setVertDragLock(true);
     InteractiveCanvas::OnMouseDown(event);
-    SetCursor(wxCURSOR_CROSS);
 }
 
 void SpectrumCanvas::OnMouseWheelMoved(wxMouseEvent& event) {
@@ -263,12 +268,12 @@ void SpectrumCanvas::OnMouseWheelMoved(wxMouseEvent& event) {
 void SpectrumCanvas::OnMouseReleased(wxMouseEvent& event) {
 	mouseTracker.setVertDragLock(false);
 	InteractiveCanvas::OnMouseReleased(event);
-    SetCursor(wxCURSOR_SIZEWE);
+    SetCursor(wxCURSOR_CROSS);
 }
 
 void SpectrumCanvas::OnMouseEnterWindow(wxMouseEvent& event) {
     InteractiveCanvas::OnMouseEnterWindow(event);
-    SetCursor(wxCURSOR_SIZEWE);
+    SetCursor(wxCURSOR_CROSS);
 #ifdef _WIN32
     if (wxGetApp().getAppFrame()->canFocus()) {
         this->SetFocus();
@@ -278,7 +283,7 @@ void SpectrumCanvas::OnMouseEnterWindow(wxMouseEvent& event) {
 
 void SpectrumCanvas::OnMouseLeftWindow(wxMouseEvent& event) {
     InteractiveCanvas::OnMouseLeftWindow(event);
-    SetCursor(wxCURSOR_SIZEWE);
+    SetCursor(wxCURSOR_CROSS);
 }
 
 void SpectrumCanvas::attachWaterfallCanvas(WaterfallCanvas* canvas_in) {
@@ -290,15 +295,19 @@ SpectrumVisualDataQueuePtr SpectrumCanvas::getVisualDataQueue() {
 }
 
 void SpectrumCanvas::OnMouseRightDown(wxMouseEvent& event) {
+    SetCursor(wxCURSOR_SIZENS);
 	mouseTracker.setHorizDragLock(true);
     mouseTracker.OnMouseRightDown(event);
     scaleFactor = wxGetApp().getSpectrumProcessor()->getScaleFactor();
 }
 
 void SpectrumCanvas::OnMouseRightReleased(wxMouseEvent& event) {
+    SetCursor(wxCURSOR_CROSS);
 	mouseTracker.setHorizDragLock(false);
+    
     if (!mouseTracker.getOriginDeltaMouseY()) {
         resetScaleFactor = true;
+
         wxGetApp().getSpectrumProcessor()->setPeakHold(wxGetApp().getSpectrumProcessor()->getPeakHold());
 
         //make the peak hold act on the current dmod also, like a zoomed-in version.
@@ -306,6 +315,7 @@ void SpectrumCanvas::OnMouseRightReleased(wxMouseEvent& event) {
             wxGetApp().getDemodSpectrumProcessor()->setPeakHold(wxGetApp().getSpectrumProcessor()->getPeakHold());
         }
     }
+
     mouseTracker.OnMouseRightReleased(event);
 }
 
diff --git a/src/visual/SpectrumCanvas.h b/src/visual/SpectrumCanvas.h
index 580d917..2d63591 100644
--- a/src/visual/SpectrumCanvas.h
+++ b/src/visual/SpectrumCanvas.h
@@ -17,7 +17,7 @@ class WaterfallCanvas;
 
 class SpectrumCanvas: public InteractiveCanvas {
 public:
-    SpectrumCanvas(wxWindow *parent, std::vector<int> dispAttrs);
+    SpectrumCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs);
     ~SpectrumCanvas();
 
     //This is public because it is indeed forwarded from
@@ -47,6 +47,9 @@ public:
     
     SpectrumVisualDataQueuePtr getVisualDataQueue();
     
+    // called by Waterfall to forward the update of the vertical scale.
+    void updateScaleFactorFromYMove(float yDeltaMouseMove);
+    
 private:
     void OnPaint(wxPaintEvent& event);
 
@@ -60,7 +63,6 @@ private:
     void OnMouseLeftWindow(wxMouseEvent& event);
     void OnMouseRightDown(wxMouseEvent& event);
     void OnMouseRightReleased(wxMouseEvent& event);
-
    
     void updateScaleFactor(float factor);
     
diff --git a/src/visual/TuningCanvas.cpp b/src/visual/TuningCanvas.cpp
index 66ebabe..b250238 100644
--- a/src/visual/TuningCanvas.cpp
+++ b/src/visual/TuningCanvas.cpp
@@ -33,10 +33,10 @@ EVT_MOUSEWHEEL(TuningCanvas::OnMouseWheelMoved)
 //EVT_KEY_UP(TuningCanvas::OnKeyUp)
 wxEND_EVENT_TABLE()
 
-TuningCanvas::TuningCanvas(wxWindow *parent, std::vector<int> dispAttrs) :
+TuningCanvas::TuningCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs) :
         InteractiveCanvas(parent, dispAttrs), dragAccum(0), uxDown(0), top(false), bottom(false), freq(-1), bw(-1), center(-1), halfBand(false) {
 
-    glContext = new TuningContext(this, &wxGetApp().GetContext(this));
+    glContext = new TuningContext(this, &wxGetApp().GetContext(this), wxGetApp().GetContextAttributes());
 
     hoverIndex = 0;
     downIndex = 0;
@@ -272,7 +272,6 @@ void TuningCanvas::OnIdle(wxIdleEvent &event) {
     if (mouseTracker.mouseInView() || changed()) {
         Refresh();
     }
-    event.RequestMore();
 }
 
 void TuningCanvas::OnMouseMoved(wxMouseEvent& event) {
diff --git a/src/visual/TuningCanvas.h b/src/visual/TuningCanvas.h
index 708ddcf..5a947be 100644
--- a/src/visual/TuningCanvas.h
+++ b/src/visual/TuningCanvas.h
@@ -20,7 +20,7 @@ public:
     enum ActiveState {
         TUNING_HOVER_NONE, TUNING_HOVER_FREQ, TUNING_HOVER_BW, TUNING_HOVER_PPM, TUNING_HOVER_CENTER
     };
-    TuningCanvas(wxWindow *parent, std::vector<int> dispAttrs);
+    TuningCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs);
     ~TuningCanvas();
 
     void setHelpTip(std::string tip);
diff --git a/src/visual/TuningContext.cpp b/src/visual/TuningContext.cpp
index 3c06161..5575c4e 100644
--- a/src/visual/TuningContext.cpp
+++ b/src/visual/TuningContext.cpp
@@ -18,8 +18,8 @@ protected:
     }
 };
 
-TuningContext::TuningContext(TuningCanvas *canvas, wxGLContext *sharedContext) :
-        PrimaryGLContext(canvas, sharedContext) {
+TuningContext::TuningContext(TuningCanvas *canvas, wxGLContext *sharedContext, wxGLContextAttrs *ctxAttrs) :
+        PrimaryGLContext(canvas, sharedContext, ctxAttrs) {
     glDisable(GL_CULL_FACE);
     glDisable(GL_DEPTH_TEST);
 
diff --git a/src/visual/TuningContext.h b/src/visual/TuningContext.h
index 5f37e50..13b8eef 100644
--- a/src/visual/TuningContext.h
+++ b/src/visual/TuningContext.h
@@ -12,7 +12,7 @@ class TuningCanvas;
 
 class TuningContext: public PrimaryGLContext {
 public:
-    TuningContext(TuningCanvas *canvas, wxGLContext *sharedContext);
+    TuningContext(TuningCanvas *canvas, wxGLContext *sharedContext, wxGLContextAttrs *ctxAttrs);
 
     void DrawBegin();
     void Draw(float r, float g, float b, float a, float p1, float p2);
diff --git a/src/visual/WaterfallCanvas.cpp b/src/visual/WaterfallCanvas.cpp
index 8efd1e5..515d3cf 100644
--- a/src/visual/WaterfallCanvas.cpp
+++ b/src/visual/WaterfallCanvas.cpp
@@ -39,11 +39,11 @@ EVT_ENTER_WINDOW(WaterfallCanvas::OnMouseEnterWindow)
 EVT_MOUSEWHEEL(WaterfallCanvas::OnMouseWheelMoved)
 wxEND_EVENT_TABLE()
 
-WaterfallCanvas::WaterfallCanvas(wxWindow *parent, std::vector<int> dispAttrs) :
+WaterfallCanvas::WaterfallCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs) :
         InteractiveCanvas(parent, dispAttrs), dragState(WF_DRAG_NONE), nextDragState(WF_DRAG_NONE), fft_size(0), new_fft_size(0), waterfall_lines(0),
         dragOfs(0), mouseZoom(1), zoom(1), freqMoving(false), freqMove(0.0), hoverAlpha(1.0) {
 
-    glContext = new PrimaryGLContext(this, &wxGetApp().GetContext(this));
+    glContext = new PrimaryGLContext(this, &wxGetApp().GetContext(this), wxGetApp().GetContextAttributes());
     linesPerSecond = DEFAULT_WATERFALL_LPS;
     lpsIndex = 0;
     preBuf = false;
@@ -486,7 +486,6 @@ void WaterfallCanvas::OnKeyDown(wxKeyEvent& event) {
 void WaterfallCanvas::OnIdle(wxIdleEvent &event) {
     processInputQueue();
     Refresh();
-    event.RequestMore();
 }
 
 void WaterfallCanvas::updateHoverState() {
@@ -583,7 +582,7 @@ void WaterfallCanvas::updateHoverState() {
         }
         else {
             setStatusText(
-                "Click to set demodulator frequency or hold ALT to drag range; hold SHIFT to create new.  Right drag or wheel to Zoom.  Arrow keys to navigate/zoom, C to center.  Shift-R record/stop all.");
+                "Click to set demodulator frequency or hold ALT to drag range; hold SHIFT to create new. Arrow keys or wheel to navigate/zoom bandwith, C to center. Right-drag or SHIFT+UP/DOWN to adjust visual gain. Shift-R record/stop all.");
         }
     }
 }
@@ -637,8 +636,11 @@ void WaterfallCanvas::OnMouseMoved(wxMouseEvent& event) {
                 demod->updateLabel(currentFreq);
             }
         }
-    } else if (mouseTracker.mouseRightDown()) {
-        mouseZoom = mouseZoom + ((1.0 - (mouseTracker.getDeltaMouseY() * 4.0)) - mouseZoom) * 0.1;
+    } else if (mouseTracker.mouseRightDown() && spectrumCanvas) {
+       
+        //Right-drag has the same effect on both Waterfall and Spectrum.
+        spectrumCanvas->updateScaleFactorFromYMove(mouseTracker.getDeltaMouseY());
+
     } else {
         updateHoverState();
     }
@@ -879,7 +881,6 @@ void WaterfallCanvas::OnMouseRightReleased(wxMouseEvent& event) {
     SetCursor(wxCURSOR_CROSS);
     mouseTracker.setVertDragLock(false);
     mouseTracker.setHorizDragLock(false);
-    mouseZoom = 1.0;
 }
 
 SpectrumVisualDataQueuePtr WaterfallCanvas::getVisualDataQueue() {
diff --git a/src/visual/WaterfallCanvas.h b/src/visual/WaterfallCanvas.h
index 21dea27..d7ba9de 100644
--- a/src/visual/WaterfallCanvas.h
+++ b/src/visual/WaterfallCanvas.h
@@ -21,7 +21,7 @@ public:
         WF_DRAG_NONE, WF_DRAG_BANDWIDTH_LEFT, WF_DRAG_BANDWIDTH_RIGHT, WF_DRAG_FREQUENCY, WF_DRAG_RANGE
     };
 
-    WaterfallCanvas(wxWindow *parent, std::vector<int> dispAttrs);
+    WaterfallCanvas(wxWindow *parent, const wxGLAttributes& dispAttrs);
     void setup(unsigned int fft_size_in, int waterfall_lines_in);
     void setFFTSize(unsigned int fft_size_in);
     ~WaterfallCanvas();