Although you can set markers on the timeline, it would be nice to be able to color code segments to quickly ID the area you want (ex. chapters in a course) You could also have multiple segments with the same color to highlight related material.
Markers just aren't powerful (and succinct) enough. Even color coding markers or adding icons -- anything to easily flat a section -- would be appreciated. For instance, a pencil icon if it needs editing, a scissors icon if it needs to be cut.
Of course keyboard shortcuts to quickly add a marker with a particular color or icon would be ideal. ;D