Peter Chamberlain wrote:In preferences you can set to have a grey background in the viewer so you can see if there is misaligned edges.
That doesn't help
at all. Well, maybe a little bit if I zoom in like crazy, but even then the subpixel placing makes it impossible to align it exactly.
Suggestion alternative 1: Buttons for aligning elements left/center/right (x) and top/center/bottom (y).
Suggestion alternative 2: Snapping edges when dragging with some modifier key pressed.
Suggestion alternative 3: Checkbox enabling a mode in which it's impossible to move the media out of the frame. Unlike the previous suggestions this would also work when using rotation/pitch/yaw.
Your screenshot brings me to another issue, from UI Design 101:
Do not use checkboxes for inherently non-boolean options, such as
"make the background grey". That's not a boolean option as it has no clear complement. What does it mean if it was unchecked? That the foreground will be made grey? Or the borders will be made grey? Or that the background will be made yellow? Or that the background will be made a random color each time, but never grey? Or that the background will be transparent, showing whatever happens to be behind the window?