For my piano instruction classes I use a rpi 3B connected to a big touchscreen. On it, I run Xournal to display sheet music and run instruction movies through omxplayer. Kind'a works (haven't found a way yet to get the omxplayer's audio to link through to the piano on an acceptable audio level and I haven't been able to use the piano's midi to flip pages yet but that another issue).
However. I would like my students to have access to sticky notes that can be visible at all time. The sticky notes should be able to contain small music scores - images would be fine too. All the apps I looked at so far don't work on RPi or do not support graphics or music score fonts. Any advice here?