connectivity warning of unused output port

[Altera_Forum]

if one of port of a module instance do not conneted to a wire /register,quartus will report a warning. 

 how I can tell quartus this port is un-used eplicitly.  quartus only report connectivity warning that i lost connection.

[Altera_Forum]

If it's an input, tie it off in your code. If it's an output, does the VHDL OPEN work? The connectivity is an extra report to help find stuff, but there aren't assignment settings to control it.  

Also, if you see a warning for one you know is all right, you can suppress that message so it doesn't show up. It won't fix the connectivity report in the Compilation Report, but it will hide the message.