cc090f632344b7b43c2abad394ca9d4f4c62ed17
brianlee
  Thu Oct 10 15:44:43 2019 -0700
Adding note about group auto-scale refs #3420

diff --git src/hg/htdocs/goldenPath/help/hgWiggleTrackHelp.html src/hg/htdocs/goldenPath/help/hgWiggleTrackHelp.html
index f264ae1..ba5ae2d 100755
--- src/hg/htdocs/goldenPath/help/hgWiggleTrackHelp.html
+++ src/hg/htdocs/goldenPath/help/hgWiggleTrackHelp.html
@@ -21,31 +21,33 @@
 <img src="../../images/2conf_enco.png" width="800px" ><br>
 <br>
 <strong>Type of graph</strong>: The default &quot;Bar&quot; setting depicts the graph data using 
 color-filled bars. To view the data as a series of points or lines, select the 
 &quot;Points&quot; setting.</p>  
 <p>
 <strong>Track height (boxed in blue)</strong>: To change the default display height of the graph in
 pixels, type in a value from within the indicated range.</p>  
 
 <p> 
 <strong>Data view scaling (boxed in red)</strong>: The default &quot;Use vertical viewing range setting&quot; 
 option displays the data using the parameters specified in the Vertical viewing range setting. To 
 configure the graph to automatically scale to a range defined by the minimum and maximum data 
 points in the current view, select the &quot;Auto-scale to data view&quot; option. To keep the 
 y=0 value in view at all times when Auto-scale is selected, set &quot;Always include 
-zero&quot; to &quot;ON&quot;.</p> 
+zero&quot; to &quot;ON&quot;. When viewing signal tracks within a composite group use
+&quot;group auto-scale&quot; to enable having all tracks scaled against the one track
+in the group that has the highest maximum data points in the current view.</p>
 <p> 
 <strong>Vertical viewing range (boxed in red)</strong>: The min and max values specify the vertical portion of 
 the graph that is displayed (default range is 30-70). These numbers can be used to set data 
 threshold indicators. For example, to display only those GC values greater than 50 percent, set 
 the min value to &quot;50&quot;.</p> 
 <p> 
 <strong>Transform function</strong>: Transforms the data points by the function selected in the 
 drop-down menu. Usually the default setting is &quot;None&quot;.</p> 
 <p> 
 <strong>Windowing function</strong>: When a  view is too large to show individual data values, the
 values must be combined to produce a plot point. This option specifies the combining function to 
 be used (default is &quot;Mean&quot;):</p> 
 <ul> 
   <li> 
   &quot;Mean+whiskers&quot; - displays the mean in a dark shade, one standard deviation around the