In Blender’s Video Sequence Editor, sometimes in the preview sequencer area (otherwise known as the Timeline), the strips’ height is very big, making it hard to navigate and to see things around. This happened randomly once and another time when I upgraded Blender to a new version.
I find this issue very annoying personally, so I was wondering if there’s a way to make the strips thinner and I research about it.
It turns out that there’s actually an easy way to customise the height of those strips straight from the sequencer area visual interface, as they say in this Blender post: https://developer.blender.org/T91724
So, in the VSE timeline/sequencer, you’ve got the right bar that has the 2 dots top-bottom.
There you can drag those dots and the whole “perspective” changes, which changes the strips’ height with it: