Applied Parameters: None
Summary
This feature is used to restore the current document to its state previous to the last operation. Multiple levels of undo are supported.
Access
This command can be accessed from the Schematic Editor and the Schematic Library Editor, by:
- Choosing the Edit » Undo command from the main menus.
- Clicking the
button on the Schematic Standard toolbar (Schematic Editor), or Sch Lib Standard toolbar (Schematic Library Editor).
- Using the Ctrl+Z keyboard shortcut.
The command only becomes available provided a change to the document has been made.
Use
After launching the command, the last operation will be 'undone' and the document will be returned to its previous state. You can determine how many operations can be redone, by defining the Undo/Redo stack. This is done by entering a value in the Stack Size field, on the Schematic - Graphical Editing page of the Preferences dialog. Setting the value to zero will clear the stack and effectively disable the Undo/Redo feature.
Tips
- There is no practical limit to the stack size except available memory. However, the stack size should be kept reasonably small so as not to unduly impinge on performance, due to the stack filling with large scale changes. The default setting is 50.
- A command that has been 'undone' using this command, can be 'redone' using the Redo command.