[Peter T. Daniels]

Sounds like what a table would do. By "locked," do you mean the rectangle
of color stays the same while the typing area gets bigger? Then maybe
it's a Shape with a Fill.

If the color stays the same but continues to fill the rectangle, then it's
probably a Table Cell. When you put your cursor in a cell, a new tab
appears on the Ribbon, which should be open to Table Tools / Design.
There you'll see Shading, with a paint can, and that will give you the
way to change the color of whichever cells are selected.

On Saturday, April 17, 2021 at 3:31:08 PM UTC-4, GlazedIZ wrote:
Thanks Peter. It doesn't seem to be tables. Hitting return, moves the
text down, but the colors stay locked. It's also not text boxes because
selecting all selects text on the whole page.