Customize/Edit link is not Visible when User Navigates to Customization > Forms > Transaction Form HTML Layout

Scenario:
User's role has the Custom HTML Layout permission set to Full but cannot see the Customize/Edit link when the user navigates to Customization > Forms > Transaction Form HTML Layouts.
 
To display the Customize/Edit link: 
1. As Administrator navigate to Setup > Users/Roles > Manage roles > Edit custom role.
2. Under Permissions tab > Setup subtab > make sure the Custom HTML Layout permission is assigned and the Level column set it to Full.
3. Add Custom Transaction Forms and Custom PDF Layouts Permissions with Full Access Level.
4. Click Save.