1. Log into your MyGuestilst account
2. Click on the Ticketing tab
3. Click on 'Dashboard' under the event name
4. Click on the Tickets tab
5. Click on the 'Edit' icon next to your ticket
6. Click on Rules and Options
7. Enter the minimum and maximum people can purchase.
If you only want them to be able to select one ticket, set both options to one. Leaving the box empty sets it to no limit.