Distinguishing markers

[Doug]

Some of my documents have Index markers, Reference markers, and other
markers all located such that you cannot see more than a single marker
on the screen.  The central way to determine how many markers there
are is to count how many times the cursor fails to move each time you
press an arrow key.  Is there a way to make the markers display
distinctly so you can distinguish them, if only temporarily?

Please CC: me off list as well as on-list.

Thanks,

--Doug