Most of these charges use the same or very near the same programming. The manuals are written by someone whose 1st language is not usually English and that makes for manuals that can be less than helpful about certain points.

Auto mode for NiMh - charger looks at batts resistance and decides what current rate to charge at - usually up to the limit you set. You have limited control and charger does most of it. Tends to work with fresh, new packs. Watch for cells getting too hot (charge rate too high).

Otherwise, manual mode, where you set the peak sensitivity and charge rate usually does a better job. Usually you toggle back and forth between modes by pressing INC and DEC at the same time when you have the mode displayed on the charger.