When doing Step Recording you currently need to set the note length before you do your note input. So you will need to pause the input to change the note length back and forth, again and again… frustrating.
A much more fluid approach would be to simply press the right arrow to extend all notes for the pressed keys a step further. Right now the right arrow moves a pause step. The only difference would be that if any keys are pressed then those notes are extended a step (if no keys are pressed the right arrow moves a pause as now).
The left arrow would shorten the notes back for pressed keys, or just move the input cursor to the left if no keys are pressed.
As described here (and how it works in Ableton Live):
In Live you input MIDI and any MIDI notes that have not yet received a note-off message will be input when you press the left/right arrow keys. > THIS IS BRILLIANT. > It’s simply astonishing how easy it is to input MIDI like this. Press piano keys, move arrow keys. … Notes can be extended by playing with the cursor inside the note and moving it to the right.
The distance that the arrow key moves the note is determined by the current grid size. Since Live has an auto grid that adjusts based on your zoom (controllable with +/- keys), you can program MIDI leads and 1 handed chords with absolute ease just using your MIDI and computer keyboard.
… I’m simply blown away by how useful this is!