Maybe this is a different request, but I see it as an adjunct to this request. I don't see an easy way from the preview screen to jump to the beginning and end of the video, nor to the beginning and end of the current section (between markers). Like the "Back one frame" and "Back to previous Keyframe", add "Back to previous marker" and "Back to Start" (as well as their forward counterparts)? Could this be included as well with the markers for beginning and end?