Solid
When all you need is a flat, colored background, create a Solid using the “Add Solid” command, rather than creating a rectangle in Photoshop.
HINT: While the basic color of a Solid is always white, you can use a Color tween track to colorize it.
![Solid screen](https://dataton.imgix.net/Files-PDF-etc/userguides/Solid-screen.png?auto=compress%2Cformat&crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&h=511&q=80&w=1920)
A 100 by 100 pixel solid white rectangle.