Mania Mode Button Problem
No confirmed fix yet. Players suggest: It's a bit odd, perhaps update the keyboard drivers and update Windows to see if it helps.

1 fixes · 2 how-to answers · Steam discussions
No confirmed fix yet. Players suggest: It's a bit odd, perhaps update the keyboard drivers and update Windows to see if it helps.
Hit the `More` panel at the top (default shortcut is F10) and it is one of the tools there. You can convert unlimited video, audio, PDF, into MIDI there.
Suggested fix (unconfirmed): Open Help to view the app tour, then go to Settings > Theme > Piano Model.