[Brian]

Happy to help! You're correct: the indent/move right pair are functionally the same. You can't assign multiple keyboard shortcuts to one command, though, and we wanted outdent/move left - which do different things - to each have a command/shortcut that they paired with.

Anticipating the follow-up question: Outdent moves the selected row to the left, and makes any sibling rows that follow it into children of that row. "Move Left" leaves the following rows with their original parent.