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/april1.html src/hg/htdocs/april1.html
index a42bfcaa02f..80e8fbb5511 100755
--- src/hg/htdocs/april1.html
+++ src/hg/htdocs/april1.html
@@ -1,26 +1,26 @@
   <hr>
   <font color="#006666" size="4"><b>1 Apr 2016
   - Going Back to Our Roots</b></font>
   <p>
   For many years, the UCSC Genome Browser has provided a dynamic, cutting-edge interface for
   viewing genomic data.  As time has gone by, however, it has become clear to us that we
   cannot keep this up.  It is not fair to you, our users, that our interface keeps changing,
   and it has increasingly been a burden on us to keep up with emerging web technologies.  Today
   that all changes, as we return you to the roots of the web: ASCII.
   <p>
-  <center><img src="images/newLook.png" width="65%"></center>
+  <center><img alt="April Fools screenshot of the Genome Browser with an ASCII text-only interface" src="images/newLook.png" width="65%"></center>
   <p>
   We apologize again for subjecting you to so many changes over the years, and hope that this
   new, more consistent interface will find your approval.
   <p>
   In related news, we have also revised the interface for uploading custom tracks.  Rather than
   forcing you to wrestle with inconvenient file formats for your data or attempt to set up a web server,
   we now provide the option of loading your data from a deck of ISO 6586:1980 punch cards.  Simply
   punch your data onto a deck and mail the deck to us.  Our staff of highly trained specialists
   will take care of loading track, and will inform you by mail when the process is complete.  Please
   note that our current policy of expiring unused custom tracks remains in effect; you must visit
   your track within 72 hours of the postmark date.  Regrettably, decks cannot be returned.
   <p>
   Card decks may be addressed to:<br>
   UCSC Genome Informatics Group<br>
   Center for Biomolecular Science & Engineering<br>