A&D BM series Instruction Manual page 16

Adjusting the level
When the bubble is off to the left：
Turn the leveling foot on the rear right in the
clockwise direction.
Level
When the bubble is off to the backward
position：
Turn both leveling feet on the rear in the
counterclockwise direction at the same time.
Level
Red circle
Bubble
Bubble spirit level
OK NO
When the bubble is off to the right：
Turn the leveling foot on the rear left in the
clockwise direction.
Level
When the bubble is off to the forward
position：
Turn both leveling feet on the rear in the
clockwise direction at the same time.
Level
水平器
Up
Leveling foot
Down
14
Down
Leveling foot
Up
BM series