Event deals apply only to the event you create them on. Global deals, by contrast, apply across all of your live events.
Finding event deals
Go to My Events in the main menu.
Hover over the Actions menu on the event you want.
Select Event Deals.
What you can create
Event deals offer the three discount code types: Discount Code (Single), Discount Code (All Tickets) and Discount Code (Entire Transaction). They behave exactly as they do globally, and the global deals article explains what each one does.
The four remaining types, Multi Entry Discount, Series Discount, Season Pass and Fixed Price Entry, are only available as global deals. If you need one of those, create it globally rather than on the event.
Editing and bulk importing
Both work the same way as they do for global deals. Scroll to the Deals section at the bottom of the page to search, Editor Delete existing deals, and use the Download template and Upload Excel links in the bottom left to import codes in bulk. Codes imported here are specific to this event.