In the older v7 you could zoom in until the guide lines in the viewport became hidden, then you could hit F key and frame a square in a square canvas size. This was useful for creating tiling textures. But in R8 the line box remains in place even when you zoom in, so you can’t frame the square into the canvas perfectly.
Is there a new way to do this – i.e. create a square plane and frame it perfectly so its edges fill the canvas without any border gaps?
OK I found out how – open Document menu and use the Zoom (Zoom Document).