Perhaps you'd prefer your calendar users' rows to be organized alphabetically, or perhaps by seniority, or perhaps by some other method altogether. You can easily rearrange those rows right from the Calendar Tab itself.

Rearrange User Rows

To alter a user's positioning on the grid, click the small cog/gear icon located in the top-left of any of the groups (which cog/gear you click is arbitrary).

You will now be able to click & drag user rows around to reorder them. Once you have everyone in the order you prefer, use the toggle next to the "Done Ordering" button to choose if your changes should propagate through future periods, or just the period you are viewing. Once you've made your selections, click "Done Ordering".

NOTE: If you drag someone to a different group altogether, this actually changes their group assignment, just like if you were to go to the "Assign People to Groups" page and re-assign them there.