OM SYSTEM OM-5 Mirrorless Camera with 12-45mm f/4 PRO Lens (Silver) - Manual (Page 245)

Highlight the desired mode and press the I button.
Choose a dial using the HI buttons and use the FG buttons to choose a role.
Press the INFO button to move between lever positions.
Press the OK button when settings are complete.
245
Assigning Roles to the Front and Rear Dials
( n Dial Function)
3.