"Undoing" an action
Like most modern programs, i2Brain allows you to "undo" your actions.
Press or Ctrl-Z to undo an action, and or Ctrl-Y to redo it.
Alternatively, choose "Edit | Undo" or "Edit | Redo" in the view's menu. You can repeat these functions until there is nothing more to undo or redo.
Please note: undoing and redoing is carried out centrally, not per view. This means that when you:
then "B" is there again, and "A" has been deleted, even though you created "A" in a different window.