293f56b870f9fb706cde5cc427e074a7c6d664b6
lrnassar
  Tue Jun 3 11:27:59 2025 -0700
Doc'ing 3 missing hg.conf settings, refs #33812

diff --git src/product/ex.hg.conf src/product/ex.hg.conf
index 85ccbb22cfc..17d04c40954 100644
--- src/product/ex.hg.conf
+++ src/product/ex.hg.conf
@@ -694,15 +694,29 @@
 # The format is browser.theme.<numberForSorting>.<labelUnderscoresAreSpaces>=<filenameInStyleDirectory>
 # A filename of "<>" means "no file", just the default CSS settings.
 #browser.theme.1.Default=<>
 #browser.theme.2.Classic=theme-classic.css
 #browser.theme.3.Sans_Serif=theme-modern.css
 #browser.theme.4.Light_Blue=theme-lightBlue.css
 #browser.theme.5.Dark=theme-dark.css
 
 # print the javascript includes to the following external javascript libraries that allow
 # the interactive tutorial to work:
 # https://cdn.jsdelivr.net/npm/shepherd.js@11.0.1/dist/css/shepherd.css
 # https://cdn.jsdelivr.net/npm/shepherd.js@11.0.1/dist/js/shepherd.min.js
 # Having this variable off will cause the files to not be included and so the tutorial link
 # in the help menu won't work
 #showTutorial=on
+#
+# For more details on the three settings below, see #33812
+# maxItemsPossible: hg.conf. Sets the maximum possible value in hg.conf that users can set in 
+# trackDb for maxItems, currently at 100,000.
+#
+# bigBedMaxItems: hg.conf. Affects data pre-filtered. Default is 10k, currently set to 100k in 
+# the RR. Maximum number of items fetched from bigBed file. If the number of the items in the 
+# displayed region is greater than allowed (which is 100k in RR now), the track goes into coverage 
+# mode drawn by the summary/zoom levels in the bigBed. If a filter is set, the track will display the 
+# message "Too many items in window to filter.Zoom in or remove filters to view track.".
+#
+# vcfMaxItems: hg.conf. Default is 10k, no other RR value. Maximum number of items fetched from file. 
+# If the number of the items in the displayed region is greater than allowed (which is 10k in RR now), 
+# the track area will have the message "Too many items in region. Zoom in to view track.".