Hi Duane,

Yes, the Yamaha can be connected to a tablet to display text, but the appropriate application must be used. Communication is in both directions. Activating Registration on the keyboard starts the text on the tablet (PDF, TXT, DOC, JPG...), but opening the text on the tablet also activates the application.
This is a video showing some of the possibilities, I hope it helps.

How to use external display / monitor and Yamaha arrangers

regards, casper