diff --git a/doc/user_guide/en/controls-functions-wide-graph.adoc b/doc/user_guide/en/controls-functions-wide-graph.adoc index c237cd501..6c1f23add 100644 --- a/doc/user_guide/en/controls-functions-wide-graph.adoc +++ b/doc/user_guide/en/controls-functions-wide-graph.adoc @@ -50,7 +50,10 @@ about right, depending on the input signal level, the chosen palette, and your own preferences. Hover the mouse over a control to display a tip reminding you of its function. -- *Smoothing* is active only when *Linear Average* has been selected. +- The *Spec nn%* control may be used to set the fractional height of +the spectrum plotted below the waterfall. + +- *Smooth* is active only when *Linear Average* has been selected. Smoothing the displayed spectrum over more than one bin can enhance your ability to detect weak EME signals with Doppler spread more than a few Hz.