Didn't you have to use the Arrange Panels/Layout Configuration window to get them in the floating window in the first place? You use the same method, just put them in a sidebar instead of the floating window. As shown here: https://musicbee.fandom.com/wiki/The_Anatomy_of_MusicBee?file=Panels_Configuration.png
Thanks for your patience.
I see, you mean put the lyrics in the right sidebar. I just didn't understand what you meant by the "lyrics window".
I think I understand now. I put the lyrics in the right sidebar and then used Arrange Panels > Right Sidebar > Panel Settings to increase the font size of the lyrics in the right sidebar. Then I brought up the floating window using the hotkey I had set and the floating window now was using the same font size as the right sidebar.
Is this what Steven (and you) were trying to tell me to do? The language of the explanations just threw me a bit. In any case, I now have a larger font in the floating window which is what I was hoping for.
I'm still thinking there is a bug with the font size getting bigger rather than smaller when using the + or - button in the floating window or using hotkeys (at least for me). I know Steven can't reproduce the problem, but I think this does need to be fixed at some point for anyone who experiences this problem.
Thanks for all your help.
Bill