HEIDENHAIN ITNC 530 - PILOT SMART NC Manual page 205

Element information
At the bottom left of the screen, the TNC displays the coordinates of the
machining position that you last selected via mouse click in the left or
right window.
Undoing actions
You can undo the four most recent actions that you have taken in the
mode for selecting machining positions. The last soft key row provides
the following soft keys for this purpose:
Function
Undo the most recently conducted action
Repeat the most recently conducted action
Soft key
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