All tracks in project have maximize and minimize options, far left of header.
But the main video track has one option only, that being restore height.
But that function doesn't function.
Vegas Pro 12.
Even using ~ to max and min all tracks has no effect on this one video track.
Any thoughts?
I'm missing something here.

Ah, just noticed green track FX not the usual green.
This is a clue methinks.