Yeah, I think I figured out that I haven't got it all figured out!!

When all is said and done, my controllers will be on a separate network from my home network. The FPP eth0 will be on the controller network, and the wlan0 will be on my home network.
I've apparently been watching too many videos too late at night. I was thinking in order to control the pixels from my computer for testing, I should see entries on the Input tab & Output tab, thinking the FPP would listen on the Input and route the data to the Output.
A light finally clicked on and I realized that Input was only for pixels directly attached to the FPP, like with an BBB/Octoscroller.
Thanks for everyone's patience with my bumbling beginnings.
Trace Wilson
Jackosnville, FL