1313ab4f97f5d5c1f2edd63533dce23ad8426ab7
braney
  Wed Oct 19 10:50:11 2022 -0700
draw zoom indicator box in the right place and make it transparent so
you can see the underlying pixel

diff --git src/hg/htdocs/style/mouseOver.css src/hg/htdocs/style/mouseOver.css
index 59ba569..b0d81c3 100644
--- src/hg/htdocs/style/mouseOver.css
+++ src/hg/htdocs/style/mouseOver.css
@@ -1,23 +1,23 @@
 .mouseOverVerticalLine {
   position: fixed;
   width: 1px;
   background: #ffff00;
   height: 100%;
   display: none;
   z-index: 999;
-  opacity: 1;
+  opacity: 0.25;
   border-style: hidden solid hidden solid;
   border-width: 1px;
   border-color: #2222cc;
   pointer-events: none
 }
 
 .mouseOverText {
   position: fixed;
   left: 100px;
   top: 100px;
   width: auto;
   height: auto;
   background-color: #3333cc;
   color: #ffff00;
   display: none;