Edits to User Guide section 6.

doc/user_guide/en/settings-radio.adoc

@@ -39,7 +39,7 @@ image::RadioTab.png[align="center",alt="Radio Tab"]
 +
 
 NOTE: A special value of *USB* is available for custom USB devices
-      like those used by some SDR kits. This is not the same a virtual
+      like those used by some SDR kits. This is not the same as the virtual
       serial port provided by USB connected transceivers and CAT
       interfaces, for those use the COM or serial port name that
       refers to them.

doc/user_guide/en/tutorial-download-samples.adoc

@@ -4,7 +4,8 @@
 === Download Samples
 
 The following steps will download sample audio Wave files that were originally recorded
-by WSJT-X. These files can be read in to simulate realtime operation. 
+by WSJT-X. These files can be read in and processed by WSJT-X to simulate realtime 
+operation. 
  
 - Select *Download samples...* from the *Help* menu.
 

doc/user_guide/en/tutorial-example3.adoc

@@ -8,7 +8,7 @@
 
 - Select *File | Open* and navigate to
 +...\save\samples\FT8\210703_133430.wav+.  The waterfall and Band
-Activity window should look something like the following screen shots:
+Activity/Rx Frequency windows should look something like the following screen shots:
 
 - You may want to pretend you are K1JT
 by entering that callsign temporarily as *My Call* on the 
@@ -25,22 +25,21 @@ image::ft8_decodes.png[align="left"]
 .Decoding Overview
 
 Decoding takes place at the end of a receive sequence. With *Decode* set
-to *Deep*, three decoding passes will be done. The *Decode* button on the 
+to *Deep*, three decoding passes will be done and the *Decode* button on the 
 mainwindow will illuminate three times, once for each pass. 
 The first decoding attempt in each decoding pass is done at the selected Rx frequency,
 indicated by the U-shaped green marker on the waterfall frequency
-scale.  Results appear in both the left (*Band Activity*) and right
+scale. All decodes appear in the left (*Band Activity*) window. The right
-(*Rx Frequency*) text windows on the main screen. The program then
+(*Rx Frequency*) text window displays any decodes obtained at the current
-finds and decodes all signals in the selected mode over the displayed
+Rx frequency along with any decodes addressed to *My Call* (K1JT in this case).
-frequency range. The red marker on the waterfall scale indicates your
+The red marker on the waterfall scale indicates your
 Tx frequency.
 
 Twenty one FT8 signals are decoded from the example file. The number
-of decodes is shown at the bottom of the main window.
+of decodes is shown in a box at the bottom of the main window.
-When this file was recorded HA5WA was finishing a QSO with K1JT and
+When this file was recorded HA5WA was finishing a QSO with K1JT, and
 his 73 message is shown in red because it is addressed to *My Call* (in this case K1JT). 
-The *Band Activity* window shows this message along with  
+By default, lines containing `CQ`
-all decodes at other frequencies.  By default, lines containing `CQ`
 are highlighted in green, and lines with *My Call* (K1JT)
 in red. Notice that K1JT has two callers; HA0DU and EA3AGB.  
 
@@ -52,10 +51,10 @@ try double-clicking with the mouse on the decoded text lines and on the
 waterfall spectral display. You should be able to confirm the
 following behavior:
 
-- Double-click on one of the decoded lines highlighted in
+- Double-click on one of the decoded *CQ* messages highlighted in
 green. These actions produce the following results:
 
-** Callsign and locator of a station calling CQ are copied to the *DX
+** Callsign and locator of the station calling CQ are copied to the *DX
 Call* and *DX Grid* entry fields. 
 
 ** Messages are generated for a standard minimal QSO.

doc/user_guide/en/tutorial-wide-graph-settings.adoc

@@ -1,8 +1,14 @@
 // Status=review
 
-Set up the Wide Graph (also called the Waterfall). 
+The WSJT-X Wide Graph window displays the frequency spectrum of the received audio. Usually, the 
+upper portion of the window shows a waterfall plot of the frequency spectrum (a spectrogram) and 
+a line plot of the current or average spectrum. Controls at the bottom of the window are used to 
+set up the displayed audio frequency range, color palette, and scaling of the spectrum displays. 
+A control on the bottom right of the Wide Graph (displayed as *Spec nn%*) allows the user to control
+the vertical fraction of the window that is occupied by the spectrum line plot.
 It is important to set appropriate lower and upper 
-audio frequency limits for the Wide Graph because these limits define the FT8 decoder's search window:
+audio frequency limits for the Wide Graph because these limits define the FT8 decoder's search window.
+For this tutorial, the limits will be set to cover 100-3300 Hz:
 
 - Set *Start* = 100 Hz.
 - Set *Bins/Pixel* = 5. Smaller/larger values make the Wide Graph cover a smaller/larger 
@@ -25,11 +31,16 @@ When *Flatten* is checked, WSJT-X attempts to correct for rolloff at the lowest
 frequencies in the spectrum: 
 
 - *Flatten* = checked 
+
+The line plot can be set up to display the current (un-averaged) spectrum or the cumulative (averaged)
+spectrum:
+
 - Select *Cumulative* for data display
 - Set the *Gain* and *Zero* sliders for the waterfall and spectrum to near midscale
 
-The *Spec* setting determines what fraction of the vertical extent of the Wide Graph will
+The *Spec nn%* setting determines what fraction of the vertical extent of the Wide Graph will
-be used for the line plot of the spectrum. Setting *Spec* to 0 will eliminate the line plot.
+be used for the line plot of the spectrum. Setting *Spec* to 0 will eliminate the line plot and
+a setting of 100 will eliminate the spectrogram and show only the line plot:
 
-- Set *Spec* = 25% 
+- Set *Spec* = 50%