Question
Is there a way to hide/restrict the Nintex Forms button on the ribbon?
Answer
An access control setting for Nintex Forms Designer via site settings (like "Allowed workflow designers" feature for Nintex Workflow Designers) is not a currently planned feature. A feature request can be submitted via Customer Feedback for Nintex
Additional Information
Restrict Access to Nintex Forms designer
To restrict access to the designer, grant users "Contribute" permission.