9f6962c173c405e481da17794d67107e7f8e73a9
jnavarr5
  Fri Oct 2 16:05:31 2026 -0700
Replacing the subtrack matrix and Sample class filter paragraph on the PRO-cap and ProCapNet description pages with the track collection layout from Mark's change, and noting that ProCapNet minus strand files store negative values, refs #35528

diff --git src/hg/makeDb/trackDb/human/encode4ProCap.html src/hg/makeDb/trackDb/human/encode4ProCap.html
index 8cdb28e0b59..125c3c30866 100644
--- src/hg/makeDb/trackDb/human/encode4ProCap.html
+++ src/hg/makeDb/trackDb/human/encode4ProCap.html
@@ -9,33 +9,33 @@
 read reports the exact base and strand of one initiation event. Unlike RNA-seq or
 CAGE, PRO-cap sees unstable RNAs as well as stable ones, which makes initiation
 at enhancers visible.
 </p>
 
 <p>
 This track shows PRO-cap signal from six ENCODE 4 experiments, one per cell line,
 on GRCh38/hg38 only. The predictions a deep learning model makes from sequence
 alone, trained on this same data, are in the ProCapNet track, available on
 GRCh38/hg38 and T2T-CHM13/hs1.
 </p>
 
 <h2>Display Conventions and Configuration</h2>
 
 <p>
-The matrix on this page has one row per cell line and one column per strand, so a
-checkbox turns on one strand of one cell line. Use the <b>Sample class</b> filter
-to restrict the matrix to cancer or non-cancer lines.
+This track collection holds one track per cell line, all shown by default. Use the
+buttons on this page to turn tracks on or off, and click a track's name to open its
+own settings, where the plus and minus strands can also be turned on separately.
 </p>
 
 <p>
 Each track is an overlay of the two strands: plus strand reads are drawn upward
 and minus strand reads downward. The y axis is the number of initiation events
 measured at that base, summed over the experiment's replicates, so tracks with
 deeper sequencing reach higher values. Tracks are colored by cell line:
 </p>
 <ul>
 <li><span style="display:inline-block; background-color:#0072B2; width:18px; height:12px; vertical-align:middle;"></span> <b>A673</b> Ewing sarcoma</li>
 <li><span style="display:inline-block; background-color:#D55E00; width:18px; height:12px; vertical-align:middle;"></span> <b>Caco-2</b> colorectal adenocarcinoma</li>
 <li><span style="display:inline-block; background-color:#009E73; width:18px; height:12px; vertical-align:middle;"></span> <b>Calu3</b> lung adenocarcinoma</li>
 <li><span style="display:inline-block; background-color:#CC79A7; width:18px; height:12px; vertical-align:middle;"></span> <b>HUVEC</b> umbilical vein endothelial cells</li>
 <li><span style="display:inline-block; background-color:#E69F00; width:18px; height:12px; vertical-align:middle;"></span> <b>K562</b> chronic myelogenous leukemia</li>
 <li><span style="display:inline-block; background-color:#56B4E9; width:18px; height:12px; vertical-align:middle;"></span> <b>MCF10A</b> non-tumorigenic breast epithelium</li>