"Non div." Symbol
Or perhaps unis. symbol? Do you see the lines next to the chords that strings are supposed to play?
There is a symbol similar to that but it's the arpeggio bracket... It doesn't "function" the same way as the other symbol does (it tells string players to play in unison/non div.). Should there a be a symbol for that or it's fine with the arpeggio marking (set play to false)?