@finitebaffle pre-wash is for your oxi-action or similar, and should only be used on programmes that actually include the pre-wash cycle. One mine it's a function you can enable on select programmes; it will then first run a (usually shorter) cycle with the detergent from your pre-wash compartment.
Unfortunately since liquid detergents in your main wash compartment have a tendency to already run down into your drum during this cycle, it's best to only use pre-wash if you use a powder for your main cycle, or else your main cycle is likely to be without detergent. Same with pods you load in the drum with your laundry.

Pre-wash compartment is usually marked with "1" or "I", and the main wash compartment with a "2" or "II". Softener tends to be a flower icon, and on the machines I've had, usually had a different coloured compartment.
Softeners also have a tendency to be terrible for your laundry machine... So best to avoid them altogether. Or try some vinegar instead.
@fesshole