In the Ad Hoc mode, the printer and computer wirelessly communicate directly with each other, without using an access point.
There is no difference between setting operations for Ad Hoc mode and the infrastructure mode on the printer. First, set the computer’s Ad Hoc settings (SSID), then connect the printer using EpsonNet Setup. For details, see
Using EpsonNet Setup. For information on setting up an Ad Hoc connection for the computer, see "Ad Hoc Settings on the Computer" in the Wi-Fi/Network Setup Guide.