Hiding the "Use Attendee #1's Information For ALL Attendees" Action

If your attendees are using the same information for additional attendees when you want them to use unique contact information for each attendee, you can update the Allow copy #1 attendee info to extra attendees setting to No.

Go to Event Smart → Registrations. Then click on the Reg Form Settings tab at the top of your screen. Scroll down to Copy Attendee Info Settings and update the setting for Allow copy #1 attendee info to extra attendees to No. 

Then save changes by clicking on the Save button.