These option switches on your BDL168 are set up using a Digitrax throttle's SWITCH commands.
(This can only be done with a Digitrax LocoNet throttle or equivalent software).
SWITCH mode is normally used for operating turnouts by issuing closed ("c") or thrown ("t") commands.
In the case of your BDL168, each switch address is a BDL168 option switch.
The following table shows what each OpSw is used for when it is set for thrown or closed.
Factory settings are indicated by shaded boxes.
Option Switches for BDL168 and RX4: