In section auction parameters, system allow to edit following fields:
Auction direction - two directions (reverse or sales) are available for selection. The differences between them are described on the page Creating a new auction.
Reference value - allows you to specify the acceptable value of an auction item.
Call value - allows you to specify the price at which the auction will start.
Final value - allows to specify the value at which the auction will end.
Value change by - allows you to specify the time after which the value will change.
Increment(amount) - allows you to set the amount by which the starting value of the auction will increase or decrease (depending on the direction of the auction).
Also check: