5709a7858d5c197721be66d5218a79124abadb70
lrnassar
  Tue Mar 17 08:46:31 2026 -0700
Adding alt text to images across static documentation pages, CGI headers, markdown docs, and Pandoc templates. Content images receive AI-generated descriptive alt text; decorative images (icons, spacers, toggles) receive alt="" per WCAG best practice. Also adds Image Descriptions section to the accessibility page, and fixes Pandoc Lua writers to output alt attributes. 67 files, covering help docs, news archive, ENCODE pages, portal pages, and session examples. refs #37254

diff --git src/hg/htdocs/gtex.html src/hg/htdocs/gtex.html
index ecd941260ff..c4514507513 100755
--- src/hg/htdocs/gtex.html
+++ src/hg/htdocs/gtex.html
@@ -115,24 +115,24 @@
         </p>
     </div>
     <div class="col-md-6">
         <h2>GTEx in the browser</h2>
         <p>
 Below is a screenshot of a  
 <a target="_blank" 
 href="http://genome.ucsc.edu/s/kate/GTEx%20demo%20for%20blog">public session</a>
 that highlights the GTEx gene expression track and GTEx RNA-seq signal hub for the 
 <a target="_blank" href="https://genome-blog.gi.ucsc.edu/blog/gtex-resources-in-the-browser/"
 >GTEx Resources in the Genome Browser blog article</a>. 
 The session shows a genomic region where 5 genes exhibit different patterns of tissue-specific expression. 
     <p class="text-center">
     <a target="_blank"
         href="http://genome.ucsc.edu/s/kate/GTEx%20demo%20for%20blog">
-            <img src="../images/gtexSessionGeneExpr.png" width="540px" height="727px"></p>
+            <img alt="Genome Browser session showing GTEx tissue-specific gene expression and RNA-seq signal tracks" src="../images/gtexSessionGeneExpr.png" width="540px" height="727px"></p>
     </div>
 </div>
 
 <!--#include virtual="$ROOT/inc/gbPageEnd.html"-->
 
 <script type='text/javascript' src='/js/hgGtexTrackSettings.js'></script>