Pentax K-50 Operating Manual page 39

 Electronic Level Display
When the camera is not level, a bar scale indicating the horizontal camera angle
is displayed in the EV bar scale, if [Electronic Level] of the [A Rec. Mode 3] menu
is activated. This is not active by default. (p.212)
When level (at 0°)
When tilted 5° to the left
When held vertically and tilted 3° to the right
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