V/% Key - Pentax ETH-302 Instruction Manual

2.3.2 [V/%] key
Pressing the V/% key will change the Vertical angle display to
V%(slope). (At the shipping, it is set at Zenith 0°)
By special key operation, horizontal 0° (VH) and Compass (Vc)
can be set.
(Factory default is Zenith 0°)
(Refer to 3.1 Setting of vertical angle.)
16