Undoing and Redoing

While building or changing the net, you can undo the last operation by choosing Edit → Undo, or pressing ctrl+z, or clicking , or right-clicking on the net background and choosing Modify → Undo.

Multiple:  To undo operations previous to that one, repeatedly invoke Edit  → Undo (or ctrl+z, or ).

Redo:  After a series of undos, you can “redo” one or more of them by repeatedly choosing Edit → Redo, or pressing ctrl+shift+z, or clicking , or right-clicking the net background and choosing Modify → Redo.

How Many:  Netica will save a great many of the previous steps for undoing, but this will be reduced if they are steps which take large amounts of memory.

Dimmed:  If you are undoing operations and the Edit → Undo menu item or toolbar button turns dim, it means you have undone all the operations that Netica has remembered.  If you are redoing operations, and the Edit → Redo menu item or toolbar button turns dim, it means that you have restored all the operations that were previously undone.

Past File Save:  You may even undo operations that were done previous to the last time the net was saved to file.  As you are undoing operations, at the point that the net matches what was last saved to file, the changed-indicator *  will disappear, and after undoing further operations, it will reappear.  Then, if you start redoing operations, once again it will disappear when the net matches the file, and then reappear.

Other Window:  The operations done in each window are remembered separately, so if you return to window A after working in another window for a while, you can still undo operations previously done in window A.