Okay, so I've been told about how to vertically zoom in or out of the audio tracks (shift arrow up/down).
How do I do the same for the video tracks?
I'm not asking about how to zoom in/out of the timeline (I know how to do that already with the mouse roller button or the up/down arrow keys). And I also don't want to expand the height of the video track either because that uses up valuable screen real estate. I'd like the timeline to remain just as it is, but I'd like to zoom into the thumbnails for the various video events because it helps to see what they are more clearly.
I may have the terminology wrong - see the attachment for a visual explanation of what I'd like to do :)