The list can specify complete call signs, prefixes, etc, including wild cards. The list can have multiple entries, and can specify calls or prefixes by band and or mode. This is a powerful facility that helps to track some of those elusive stations, such as a BI9 on a rare IOTA, when the spot does not contain an IOTA reference, or an operation from a new IOTA before the IOTA reference has been issued. This is a powerful tool for the DXer. Spots may routed simultaneously to the screen, a text file and the printer.
Separate filters can apply to each.
See IOTA for more details. The narrow window at the bottom of the screen is used for entering packet commands. The size of this window can be increased if required.