[How To] Manage SharePoint Groups

You must be a site owner before you can perform this steps

1. Click on the gear icon on the upper right corner of the screen.
   
2. Select Site Permissions.
3. On the right panel that appears, select "Advanced permission settings".
   
4. To add user, click on New > Add Users
   
5. To delete a user, check on the user(s), then click Actions > Remove Users from group.
   
   Click OK when prompted.