Scaler wants to have this feature. For example, add a BASS button to your chord editor at the bottom. If you click BASS, you can add a bass key to each chord, so you don’t need to click Edit chord for each chord, and add a bass.
For example, chord Cmaj C E G, and then in order to make the chord complex and full, I click the BASS button, which will automatically turn the chord into a low 8 degree C E G.
If you have another pad button, it’s more appropriate. Clicking on pad will add pad tones to all chords. Then drag it into the MIDI track, run it and edit it.
I think it saves a lot of time.
You can even add drag bass midi, drag pad midi… etc. to drag midi.
Hope the software is getting better and better