How to restrict a custom opportunity form for a specific role?

In order to perform the steps below, use the Administrator role.

1. Navigate to Setup > Users/Roles > Manage Roles
2. Click Edit/Customize by the Role for which the custom form will be restricted
3. Click Forms tab
4. Click Transaction subtab
5. Find the forms with a Opportunity Type
6. Preferred: Enter Checkmark by the form you want to restrict for this Role
7. Enabled: Remove Checkmark for other Opportunity forms
8. Click Save