Coping with Mistakes
OpenPlant PID supports unlimited undo, which lets you undo drawing operations to recover from a mistake. After you undo an operation, the operation previous to the negated operation can be undone. You can therefore undo a series of previous operations by repeatedly selecting Undo. You can use Redo to negate the last undo operation or a series of negated operations by repeatedly selecting it. You can use the View Previous and View Next view controls to scroll through viewing operations on a per view basis.
Note: A limitation on undoing is that unless you are recording the open DGN file's design history, you cannot undo operations made before the file was last closed (or compressed). This is because when you close (or compress) the file (including "save as"), the undo buffer is emptied. A DGN file is compressed by selecting .
Note: If you know how many operations you want to undo, key in UNDO n, where n is the number of operations.