Hi there,
If you have selected one of these rotators: Prosistel D, Green Heron, DCU1 or Yaesu GS232B then the UART/serial port is already in use and therefore it isn't possible to use other Function types which also use the UART. So what you see is most likely the program blocking combinations of features not supported. That will also make the Antenna selection page show "Not supported in this Function type".
What is a "real manual"? Not paper I suppose, hehe? A PDF maybe?