There are two questions about how to notate a piano broken chord in which each note is sustained with the fingers while the others are played.
- Is there piano notation for finger sustained notes (as opposed to pedal sustain)?
- What's the proper piano notation for adding one note at a time to a chord and holding all the notes?
I participated in the latter one, so posting here in the hope that someone more neutral will vote to close as duplicate one or the other. I'm a frequent voter and will follow your lead (whoever you are...).