5b32ea4a88968fb3a9d1e11d57f1dcbaa642f68e
lrnassar
  Fri Jan 5 14:03:52 2024 -0800
Adding some clarification as to what the offsets mean in the interaction format for the GeneHancer track, refs #24330

diff --git src/hg/makeDb/trackDb/human/geneHancer.html src/hg/makeDb/trackDb/human/geneHancer.html
index 15a39f9..c7446c9 100644
--- src/hg/makeDb/trackDb/human/geneHancer.html
+++ src/hg/makeDb/trackDb/human/geneHancer.html
@@ -18,30 +18,35 @@
 <li>Interactions (associations) between regulatory elements and genes</li>
 <li>Clustered interactions, by gene target or GeneHancer</li>
 </ul>
 The full set of elements and interactions is included, along with a highly filtered 
 &quot;double elite&quot; subset.
 
 <h2>Display Conventions</h2>
 <p>
 Each GeneHancer regulatory element is identified by a GeneHancer id. 
 For example: GH0XJ101383 is located on chromosome X, with starting position of 101,383 kb
 (GRCh38/hg38 reference).
 Based on the id, one can obtain full GeneHancer information, as displayed in the Genomics 
 section within the gene-centric web pages of GeneCards. Links to the GeneCards information pages
 are provided on the track details pages.</p>
 
+<p>
+For the interaction tracks (Clusters and Interactions) a slight offset can be noticed between 
+the line endpoints. This helps to identify the start and end of the feature. In this case,
+the higher point is the source (enhancers) and the lower point is the target.</p>
+
 <h3>Regulatory elements</h3>
 <p>
 Colors are used to distinguish promoters and enhancers and to indicate the GeneHancer element confidence score:</p>
 <p>
 Promoters:&nbsp;
 <span style="border: 2px inset #000000; background-color:#cc0000;">&emsp;&emsp;</span>&nbsp;High
 <span style="border: 2px inset #000000; background-color:#ff3333;">&emsp;&emsp;</span>&nbsp;Medium
 <span style="border: 2px inset #000000; background-color:#ff6666;">&emsp;&emsp;</span>&nbsp;Low
 </p>
 <p>
 Enhancers:&nbsp;
 <span style="border: 2px inset #000000; background-color:#5F5F5F;">&emsp;&emsp;</span>&nbsp;High
 <span style="border: 2px inset #000000; background-color:#A0A0A0;">&emsp;&emsp;</span>&nbsp;Medium
 <span style="border: 2px inset #000000; background-color:#C0C0C0;">&emsp;&emsp;</span>&nbsp;Low
 </p>