ca4b6d0d29c6d29b43df588a4635b556acc84f7f
lrnassar
  Fri Jul 31 16:59:51 2026 -0700
Fix maxCheckboxes spelling in trackDb docs, which listed it as maxCheckBoxes.
Setting names are case sensitive and the browser reads the lowercase form, so
hubs copying the documented spelling silently got the default. Also adds
level-new tags to the faceted composite settings metaDataUrl, primaryKey,
maxCheckboxes and dataTypes so hubCheck -checkSettings recognizes them instead
of reporting them as unknown. refs #37965

diff --git src/hg/htdocs/goldenPath/help/trackDb/changes.html src/hg/htdocs/goldenPath/help/trackDb/changes.html
index 0378697289f..62ba038339b 100755
--- src/hg/htdocs/goldenPath/help/trackDb/changes.html
+++ src/hg/htdocs/goldenPath/help/trackDb/changes.html
@@ -33,30 +33,40 @@
 
 <DIV class="trackDbDoc_intro">
 <H1>Track Database Definition</H1>
 
 <p>This document summarizes the changes to the <a href="trackDbHub.html">UCSC Genome Browser Hub TrackDb specification</a>.<p>
 
 <TABLE class="settingsTable" id="Common_Settings">
 <tbody>
 <tr valign="TOP">
 <th width="100">Date</th>
 <th width="15%">Track Types</th>
 <th width="15%">Link to Doc</th>
 <th>Change</th>
 </tr>
 
+<tr>
+    <td>2026-07-31</td>
+    <td>faceted composite</td>
+    <td><a href="trackDbHub.html#maxCheckboxes">maxCheckboxes</a></td>
+    <td>Documentation fix: this setting was previously listed here as
+    <code>maxCheckBoxes</code>, with a capital B. Setting names are case sensitive and the
+    browser has always read it as <code>maxCheckboxes</code>, so hubs that used the
+    capitalized spelling fell back to the default of 20 facet values. If your hub sets
+    <code>maxCheckBoxes</code>, change it to <code>maxCheckboxes</code>.</td>
+</tr>
 <tr>
     <td>2026-07-08</td>
     <td><b>genomes.txt setting</b></td>
     <td><a href="trackDbHub.html#codonTable">codonTable</a></td>
     <td>New <code>codonTable</code> genome-stanza setting (an assembly hub
     <code>genomes.txt</code> setting, not a track setting) assigns NCBI genetic
     codes to individual sequences for amino acid display, e.g.
     <code>codonTable default=1 NC_017929.1=13</code>. Affects the base position
     track three-frame translation, codon-colored tracks such as gene
     predictions, and details pages. Sequences named chrM/chrMT still default to
     the vertebrate mitochondrial code.</td>
 </tr>
 <tr>
     <td>2026-06-02</td>
     <td>bigBed, bigGenePred</td>