Hi Michael,
just open the Track-Layout-Editor and in the attached picture you can see the button (marled in BLUE) for the locnumber-panels.
Please notice: There MUST be a feedback contact assigned to each locnumber-panel!
For example:
1. Draw your layout by placing track symbols
2. Place solenoid devices (turnouts, signals, switches, etc.)
3. Assign addresses to those solenoid devices
4. assign feedback contacts to the track symbols where appropriate and corresponding to your real layout.
5. Place locnumber-panels wherever you want a loc to start/stop controlled by WDP (as shown in the example I sent you).
Regards
Rüdiger
P.S.: Forget the RED line in the picture! I just had no "clean" picture available...