Press and hold the controller button (6) to enter the main menu.
Rotate the controller ring (6) to select the Reticle & Zeroing menu item and enter by briefly pressing the controller button (6) – zeroed distances are displayed at the bottom.
Select a non-primary distance and enter the submenu for operating the distance with a brief press of the controller button (6).
Select Change Primary Distance item.
Press the controller button (6) briefly.
Icon next to the selected distance confirms the change of primary distance.
There will also be a recalculation of corrections in clicks for other distances relative to the new primary distance.