Details behind colour blocks

Hi

I’m doing an animation at the moment and I will at some point want to animate the facial expression of one of the characters, but the only problem is that I’ve filled in the face to be white colour and when I turn on onion skin the finer details of the face doesn’t show.

If anyone can help, thanks…

Try this:
Go to View / Onion Skin / Show Outline on Onion Skin…

Regards
Nolan