Adobe app in file sharing in iTunes will not allow me to add more? the add button is not visible

[iMore Question]

I use adobe reader to load and share pdf docs.. to my ipad.. I open iTunes when connecting ipad go to device, the ipad, scroll down to adobe app in file sharing near bottom.. I have done a bunch but not add button not shown and cannot figure out how to add any more files... geo

 

[kch50428]

For the life of me, I can't figure out what you're talking about.