Press and hold the controller button (6) to enter the main menu.
Rotate the controller ring (6) to select the Zeroing menu item and enter by briefly pressing the controller button (6) – the zeroed distances are displayed.
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.
The differences of other distances from the new primary distance are recalculated as per clicks.