How to advance cursor when adding chord symbols? Tab key no longer works, nor does command-right arrow

Hi, everyone, I have tried various keystrokes to be able to efficiently type in my chord symbols but I'm not getting anywhere. I'd really like to reassign the tab key to advance from one chord symbol to the next note in the melody for a new chord symbol if desired, but I don't see how to do this. I'm running the latest version of 4. It is a massive time suck to have to click on each note that I wish to add a chord symbol and type command-k instead of just advancing. Any help is much appreciated. TIA