help mapping a key with shift pressed

So, I have a blackwidow lite stormtrooper edition. I also speak spanish so I write a lot in spanish but to do it better I need to change only one key to the letter "ñ". I am able to change a key to write "ñ" but I have no idea how to make the same key to write the capital "Ñ" when pressing shift. Synapse only lets me change what happens if you press that key without shift, when I press it with shift it just shows me the same letter lowercase. I can't change the keyboard language in windows as that moves most of the symbols around and I just need to change one. Am I missing something? how can I change what happens with shift or ctrl or alt? Is it possible?