A Group or Company Admin can easily change the role of anyone in their Users-list by finding the user they want to edit and clicking the Edit user-symbol. Note that from the 'Users'-tab you can only set the roles Sharer (user), Company or Group Admin. To make someone a channel manager, follow these instructions and to make someone a channel analyst, follows these instructions.
In the user's settings window, simply click on Set role next to their current role and the Set role window will open.
Which roles you can set depends on your company Smarp domain. If your company Smarp domain has Groups enabled, you will see the option of Group Admin. If your domain does not have Groups, you will not see the Group Admin option.
To change the user's role, choose the role you want to give them and click Set role. And voilà, their role has been changed! Ask the user to log out of their current session in Smarp and then log in for all the changes to take effect.
If you want to remove an Admin role from a person, you also navigate to the 'Edit user'-page, but next to their role in the user's settings you will see the option Remove role. Click this button to change the role of this user back to a Sharer, i.e. a regular user.
If you instead would want their role to be Group admin, click Set role and change their role to Group Admin from the list.