On hover over (without the markers), display:
width, frequency, duty cycle, period
When using the markers, display:
rising edges, falling edges, average duty cycle, average frequency, etc
Also make it possible to bookmark/annotate positions or ranges. When working with complex signals it's easy to get lost (I run out of working memory in my head).
Navigation should include button for "next edge" so the horizontal scroll jumps to next next edge.
You can add markers at any random position by double-clicking in the ruler/timeline at the top of the trace view. Most people don't know about this though, needs to be made a bit more intuitive maybe.
I did not know that -- very useful, thanks!