HEIDENHAIN ITNC 530 - PILOT SMART NC Manual page 163

Function Soft key
Display or hide rulers
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Zoom function: Shift zoom area up (last soft-key row)
Zoom function: Shift zoom area down (last soft-key row)
Zoom function: Shift zoom area to the left (last soft-key
row)
Zoom function: Shift zoom area to the right (last soft-key
row)
Zoom function: Magnify workpiece. The TNC always
magnifies the center of the view currently being displayed.
Use the scroll bars to position the drawing in the window
so that the desired section appears after the soft key has
been pressed (last soft-key row).
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