77b3375e4c19ea49971bc9f301c8ee13b401f974
brianlee
  Wed May 4 10:08:24 2022 -0700
Adding a link to blog post about sharing URLs in custom tracks user guide, refs #24314

diff --git src/hg/htdocs/goldenPath/help/customTrackText.html src/hg/htdocs/goldenPath/help/customTrackText.html
index 147a785..a219f60 100755
--- src/hg/htdocs/goldenPath/help/customTrackText.html
+++ src/hg/htdocs/goldenPath/help/customTrackText.html
@@ -686,34 +686,43 @@
   <a href="/FAQ/FAQreleases.html#release1" target="_blank">FAQ</a>. Examples of this include:
   db=hg38 (Human Dec. 2013 assembly = GRCh38), db=mm10 (Mouse Dec. 2011 assembly = GRCm38).</li>
   <li>Additionally, particular genome assemblies, including assemblies in assembly hubs, can be specified using
   the <em>genome</em> parameter, <code>genome=&lt;databaseName&gt;</code>, which acts in the same manner as
   the <em>db</em> parameter. Here is an example using the house mouse (<i>Mus musculus</i>, 129S1_SvImJ)
   assembly hub:
   <a href="http://genome.ucsc.edu/cgi-bin/hgTracks?genome=129S1_SvImJ&hubUrl=http://hgdownload.soe.ucsc.edu/hubs/mouseStrains/hub.txt"
   target="_blank">http://genome.ucsc.edu/cgi-bin/hgTracks?genome=129S1_SvImJ&hubUrl=http://hgdownload.soe.ucsc.edu/hubs/mouseStrains/hub.txt</a></li>
   <li>
   The genome position to which the Genome Browser should initially open. This information is of the
   form <code>position=&lt;chrPosition&gt;</code>, where <em>chrPosition</em> is a chromosome number, with
   or without a set of coordinates. Examples of this include: position=chr22,
   position=chr22:15916196-31832390.</li>
   <li>
   The URL of the annotation file on your web site. This information is of the form
-  <code>hgt.customText=&lt;url&gt;</code>, where <em>url</em> points to the annotation file on your website.
+  <code>hgt.customText=&lt;url&gt;</code> or <code>hgct_customText=&lt;url&gt;</code>,
+  where <em>url</em> points to the annotation file on your website.
   An example of an annotation file URL is <a href="test.bed"
   target="_blank">http://genome.ucsc.edu/goldenPath/help/test.bed</a>.</li>
 </ul>
+<p>
+A special blog post discusses and provides examples of many of these parameters such as
+<code>hgct_customText=&lt;url&gt;</code>, <code>db=&lt;databaseName&gt;</code>,
+<code>hubUrl=&lt;url&gt;</code>, and <code>genome=&lt;databaseName&gt;</code> to attach
+custom tracks, track hubs, assembly hubs, and even track hubs to assembly hubs, all in a
+single URL. Read an overview of ways to share Genome Browser data views in the
+<a href="https://genome-blog.soe.ucsc.edu/blog/2021/08/13/sharing-data-with-sessions-and-urls/"
+target="_blank">Sharing Data with Sessions and URLs</a> blog post.
 
 <a name="optParams"></a>
 <p>
 You can add other optional parameters to the URL: (Note: Display may vary if you have conflicting
 cart variables, for example having both hide all and highlight features.)
 <ul>
   <li>
   <code>guidelines=on/off</code> - activate or deactivate the blue guidelines - 
   <a href="../../cgi-bin/hgTracks?db=hg19&position=chr9%3A136130563-136150630&guidelines=off" 
   target="_blank">example link</a> to switch off blue guidelines</li>
   <li>
   <code>hgFind.matches=&lt;listOfNames&gt;</code> - highlight features given their names -
   <a href="../../cgi-bin/hgTracks?db=hg19&position=chr9%3A136130563-136150630&hgFind.matches=uc010naf.1,uc011mcz.1" 
   target="_blank">example link</a> to highlight two transcripts of the ABO gene</li>
   <li>