G - Commands   
GUI_STEPBACK (command)
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It returns to the previous step of the command

 

  Menu : Edit One step back

 Command line: Shift ESC

The inner command GUI_STEPBACK (not recognized by the command line) is activated by the Shift Esc key sequence.

Using Shift-ESC It is possible to return to the previous sub-command, in complex commands.
For example, if an horizontal construction line has just been inserted using the XLINE H ENTER command, it will then be possible to insert a vertical construction line using the Shift ESC V ENTER command.