When working with text, every time I want to choose one of proposed alternate glyphs I have to move my hand to mouse and click the desired symbol.

This is tiring. I work with text. Why can’t I press a key to move the focus to this popup, use arrows to navigate to a desired one, and press Enter to confirm my choice? Why use mouse while I type?
Or is it a way already and I just can't find it?

Please, make a way to access these without mouse.