I'm using my macbook pro with an international Spanish PC keyboard and am trying in vain to find the tilde '~' character. I've tried the layouts "British - PC" and "U.S. International - PC" but cant figure out how to get that tilde to show.

On the U.S. layout, when I press the key between left-shift and Z, I get the back tick '`'. When I use shift, I get '˜'. With the option key I get a back tick as well.

On the British layout, when I press the button below escape I get the back tick, but with shift I get "¬". With the option key I get '¦'.

Anyone know what I need to press?