Roadmap for PDF reader in Microsoft Edge

I've been using Microsoft Edge Developer Ed since it was announced Alpha years ago. I've seen some great leaps in Edge over that time, all without compromising the stability and the solid performance of Edge. It is a great feather in the development teams cap for their work - well done.

The PDF reader within Edge is working a dream. Although this morning I was highlighting text in a PDF (dark mode) and needed to use another color from the Yellow I normally use, and yet to my surprise after finishing with the alternate color I find NO WAY back to using the Yellow highlight color.

Only 4 colors (and black) for options? Really? Where's my much loved Yellow, the staple of any good highlighting aficionado? Is there a setting I am unaware of to add further highlight colors to my dropdown selection in the toolbar?

Please address the highlight colors and options to include others (hint: Yellow) to a selection option within Settings. It would help a long way to a continuing sanity of this user. Thanks.