If you're an account owner and need to make one of your team members an admin or you're a user and want to be a team admin, getting that set up is simple.
The account owner needs to head over to their team page.
There, select the ··· menu next to the team member's name and choose "Make admin".
And that's it! Any team admin can now add or remove other team members, transfer canvas ownership, edit canvases (even canvases owned by other team users) as well as assign other team members as an admin.
Note: The account's billing section will continue to stay hidden from administrators and will be available only to the account owner.
To get started with making a user an admin, head over to your team page.