If you make a line break in the comment, only the first line will show in the timeline. So, if you had a comment like
“1
this is a very long explanation of what this marker really means in this composition”
you only see the “1” in the timeline.
Thus, I expect, someone with scripting experience should easily be able to make a script that adds and removes a line break to “hide” and “show” marker comments.
If you do it that way, even without the script, you can hover over the marker to see the full text.
Kalleheikki Kannisto
Senior Graphic Designer