Tip: To temporarily set the max undo/redo for the active session

This is from the Tips & Techniques section of the VX CAD/CAM online help.

You can use a command line function to temporarily change the maximum number of undo/redo steps that are logged during the active session only. The syntax is "$NumUndo <number of steps>". For example, to set the number of undo/redo steps to 100, in the text input field you would type "$NumUndo 100" (quotes excluded). This function will temporarily override the max undo/redo setting defined in the VX Configuration Form for the active session only.

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