I need to be able to resize the effect strip "Colour" in the VSE, which is defaulting to full screen size, and I can find no options to resize it to be smaller and occupy the exact part of the video I need it to occupy. It's all or nothing. I tried looking it up in the Blender manual, at https://docs.blender.org/manual/en/dev/editors/vse/sequencer/strips/effects/color.html, but those instructions were not helpful at all and appear to be wrong. I have no tools to edit the size of my colour strip and I tried using the "crop" tool inside the "edit strip" box, but that did nothing.
So how am I supposed to do this?