How to Add a Custom Role
Sign in with Instance Admin user
On the Admin page click Roles
Click +Add Roles
Add the name of your new role in the Description
Search in Available Permissions field and Checkmarks the roles you wish to enable
Click the > arrow to add the roles
Use double arrows to add / remove all roles.
Once all roles have been added to the Assigned Permissions side click Save.
When adding roles you can toggle off/on Show System Role.