Dynon Avionics FlightDEK-D180 Pilots Users Guide - Manual (Page 52)

EFIS Operation
FlightDEK-D180 Pilot’s User Guide 5-15
In the EFIS > OATSET menu, press INC- or DEC+ until the value-setting box above the menu displays the current
outside air temperature. This value is then used in the OAT/TAS/DA info item on the EFIS screen. For more information
on setting up that display, see page 5-12.