- Press and hold
. 2. While holding, press (Compare) to retrieve the original version of the current program (display shows 'C'). 3. To discard edits without saving, simply select another program. 4. Note: The manual describes a 'Compare' function (Shift+Up) to revert to the stored version. A global 'Factory Reset' button combination is not explicitly detailed in the provided text, though 'Program 21-40' are fixed factory programs.
Source: 4 Pole — wdf006.raw (manual)