The user access rights scheme can be assigned in two ways.
Directly from the access rights document
In the user rights document, go to the second tab and, being in the document editing mode, click on the IMPORT PERMISSIONS button.
In the next step, select the appropriate access rights scheme and approve the action.
From the user list view (additional authorization is required)
Select the appropriate users and point to the Import permissions -> from scheme button in the lower right. In the next step, select the appropriate access rights scheme and approve the action.
Once the user is correctly assigned to a scheme, access rights from the scheme will be assigned to that user. You can review users assigned to the scheme from the scheme document in the ASSIGNED PEOPLE section
Additionally, you can display users by assigned scheme on the USERS -> ACCESS RIGHTS SCHEME