HEIDENHAIN TNC 640 (34059x-02) ISO programming - Manual (Page 232)

Programming: Data transfer from DXF files or plain-language contours
7.1 Processing DXF Files (Software Option)
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TNC 640 | User's Manual for DIN/ISO Programming | 5/2013
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 following icons are
available:
Function Button
Undo the most recently conducted action
Repeat the most recently conducted action
Mouse functions
Use the mouse for magnifying and reducing as follows:
Define the zoom area by dragging the mouse with the left
button depressed
If you have a wheel mouse, you can use it to zoom in and out.
The zooming center is the location of the mouse pointer
Click the magnifying glass icon or double-click with the right
mouse button to reset the view to the default setting
You can move the current view by depressing the center mouse
button.
If 3-D mode is active, you can rotate and tilt the view by depressing
the right mouse button.