JMRI Preferences setup
From Jmri
In general, if things are working as expected, you shouldn't need to change any of the settings herein. However, if this is not the case, please read on....
After you have started any of the JMRI programs you can access this page via the usual 'file -> preferences' or similar choice - Something similar to this window should open:
Clicking on the 'layout connection' box will open a list of ways that the program supports connecting to your layout. Hopefully you can find the relevant option in this list - Select it and save.
Hopefully the remaining options can be figured out from a combination of your user manuals and common sense! [No offense, but if you don't know what command staton you're using we probably can't help :-) ]
Once these are set appropriately, you should be able to get to the 'start screen' shown in the DecoderPro page without either option being 'greyed out'