Next window (just green line) at the top right
Next /previous window. (green/red line) at the top right.
When mouse goes over green line,
creates same effect as alt + tab and release.
When mouse goes over red line,
creates same effect as alt + shift + tab and release.
With customisable size length(s) and coulor(s).
Something like this, but with line all over the top was on Amiga computers.
You could click on line and drag window (down).
This is a mock-up.