48767d83b6b5cbba8bfa1bfada682effec74f83f
dschmelt
  Wed May 8 14:35:15 2019 -0700
Adding defintions for URL params #23131

diff --git src/hg/htdocs/FAQ/FAQlink.html src/hg/htdocs/FAQ/FAQlink.html
index e6ec771..8a3f17f 100755
--- src/hg/htdocs/FAQ/FAQlink.html
+++ src/hg/htdocs/FAQ/FAQlink.html
@@ -62,50 +62,54 @@
   refers to the Feb. 2009 human genome release. For a list of db parameter values that 
   correspond to UCSC assemblies, see the <a href="FAQreleases.html#release1">list of UCSC 
   releases</a>.</li>
   <li><code>position</code> - can be any search term for the genome specified, including
   a position range or a gene identifier. This often takes the form of
   <code>position=chr1:35000-40000</code>.</li>
 </ul>
 <p>The following link is an example of a URL that declares assembly and position:</p>
 <p><code><a href="../cgi-bin/hgTracks?db=hg19&position=chr1:35000-40000">http://genome.ucsc.edu/cgi-bin/hgTracks?db=hg19&position=chr1:35000-40000</a></code></p>
 
 <a name="trackViz"></a>
 <h2>Setting Track Visibility via URL</h2>
 <h6>How do I create a custom URL to control the visibility of specific tracks?</h6>
 <p>
 You can control the visibility of tracks from the URL with the following parameters, 
-each linked by the "&amp;" sign, similar to position parameters. For the full list, please see the 
-<a href="../../goldenPath/help/customTrack.html#optParams" target ="_blank">optional URL 
+each linked by the "&amp;" sign, similar to position parameters. For more information, please see
+the <a href="../../goldenPath/help/customTrack.html#optParams" target ="_blank">optional URL 
 parameters</a> section of the Custom Tracks User's Guide. Note that <em>italic text</em> indicates
 a user choice, not a working example.</p>
 <ul>
-<li>hideTracks=1</li>
-<li><em>trackName</em>=hide|dense|pack|full</li>
-<li>textSize=<em>number</em></li>
-<li>ignoreCookie=1</li>
+<li><code>hideTracks=1</code> - hides all tracks</li>
+<li><code><em>trackName</em>=hide|dense|pack|full</code> - sets specified track or subtrack to a
+chosen visibility</li>
+<li><code>textSize=<em>number</em></code> - sets browser text size to a chosen number, default of 
+8 and maximum of 24.</li>
+<li><code>ignoreCookie=1</code> - removes pre-existing user settings like track seletion, custom
+tracks, and track hubs.</li>
 </ul>
 <p>
 For example, you can use the following command to hide every track (hideTracks=1) and set the knownGene track to 
 the pack visibility (knownGene=pack):</p>
 <p><code><a href="../cgi-bin/hgTracks?db=hg38&hideTracks=1&knownGene=pack">http://genome.ucsc.edu/cgi-bin/hgTracks?db=hg38&hideTracks=1&knownGene=pack</a></code></p>
 
 <p>Composite tracks have additional URL parameters that encode options to hide, select, and 
 display subtracks.</p>
 <ul>
-<li><em>trackName</em>_hideKids=1</li>
-<li><em>trackName</em>_sel=1</li>
+<li><code><em>trackName</em>_hideKids=1</code> - hides a specific composite track's subtracks</li>
+<li><code><em>trackName</em>_sel=1</code> - selects specific subtrack to be 'checked', allowing
+display</li>
 </ul>
 <p>For example, the following URL hides all tracks (&amp;hideTracks=1), hides a specific composite
 track's default subtracks (&amp;refSeqComposite_hideKids=1), turns on one specific subtrack 
 (&amp;ncbiRefSeqCurated=full), and checks a box to display that subtrack 
 (&amp;ncbiRefSeqCurated_sel=1).
 
 <pre><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?db=hg38&hideTracks=1&refSeqComposite_hideKids=1&ncbiRefSeqCurated=full&ncbiRefSeqCurated_sel=1">https://genome.ucsc.edu/cgi-bin/hgTracks?db=hg38&hideTracks=1&refSeqComposite_hideKids=1&ncbiRefSeqCurated=full&ncbiRefSeqCurated_sel=1</a></pre>
 
 
 <h2>Loading data with the URL</h2>
 <a name="ctUrl"></a>
 <h3>Loading Custom Track data with the URL</h3>
 <h6>How do I create a link to my custom track data?</h6>
 <p>
 You can combine the URL visibility settings with the <code>&amp;hgct_customText=</code> parameter using