I can't find this in the manual: Why are the corners of video events sometimes light blue instead of the typical dark blue? (Even when opacity is set to 100% at the first/last frames - no fading).
I just want to make sure the ends/beginnings of these events are clean.
Light blue means there is a fade, but it's too narrow at the current zoom level to show. When you zoom in more, when the fade is wider than the triangle, the triangle disappears and you just have a notched corner.
You can also tell when events are overlapped this way; dark blue on both events (which merge together into a single triangle pointing down) means no overlap (and no fades). A single light blue triangle means a small (at the current zoom) overlap & crossfade, a pair of light blue triangles (which again merge together) means two small fades, and a dark/light combo means a small fade next to no fade.
Once you know the light/dark difference, it's actually easier to understand than this message makes it sound <g>.