How to get the font color to stick in Writer? or How to distinguish collaborators edits?

If someone shares a file with me, I'd like to be able to edit it in a way that the owner can easily see my edits.

I don't see any way to do that easily. If I change font color. It stays changed only as long as I don't do a cursor movement (either mouse or arrow key). Once I do a cursor movement the color reverts to black. This makes collaboration difficult.

Am I missing something? (I would think this would be a fundamental capability of a collaboration tool. This feature must exist, and I must be missing it. )

-gary