^^ a more recent screenshot...  the below are gettin' olden...

standard sheet music notation beginnings...
still some bugs with the keysig (1st flat on top clipped off)
and I'm not yet joining stems so flags for EVERY note are shown...
Pretty ugly, but it's a START.

on the piano roll...
a green dot means "here's a note you ain't hit yet".
A red x means "stop that".
Else it's colored with sort of the solfege-ish color of
the pitch within the octave.
tonic=red, dominant=cyan, etc.

The grid shows measures, beats and 8th notes for this song ("Love Story").
The piano roll's 2 grey colors show if the note is on a black or white key.
octaves are numbered on the Cs in blue and
the lower case m means g minor keysig.
chords in alternating blue and red in right margin.

might have to uncolor the grey area for sanity...  next release or somethin