Panasonic LP-310 Operation Manual page 112

(1) Mirror inversion
The mirror inversion has two types, horizontal inversion (Mirror) and vertical inversion (Flip).
•
"Mirror" Horizontal mirror inversion (Y axis symmetric)
All character strings and CAD files are marked at the position symmetric to Y axis.
•
"Flip" Vertical mirror inversion (X axis symmetric)
All character strings and CAD files are marked at the position symmetric to X axis.
Both horizontal and vertical inversions are available to be set simultaneously.
The relation between the respective check box set ON/OFF and image indication is as follows.
Mirror (Y axis symmetric): OFF
Flip (X axis symmetric)
Mirror (Y axis symmetric): OFF
Flip (X axis symmetric) : ON
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: OFF
Mirror (Y axis symmetric): ON
Flip (X axis symmetric)
Mirror (Y axis symmetric): ON
Flip (X axis symmetric) : ON
: OFF