How do I change room roles for a room?

You need to be a room admin to change room roles. Select the room you want to modify room roles for. Click on the triple dot menu either within the room or the sidebar.

Select 'View Members'. Once you do, you'll see all the members and their room roles.

Click on the triple dot menu next to a members' name to change room roles.

If the room admin is also a space owner, under a member's name, you can also quickly change space role of someone from guest to team member or vice-versa.