Razer Blade 15 Base Model FN + F1-12 keys

I used to be able to hold down FN and F1 for example to mute the audio AND use the F keys for things like Alt + F4, but now I can only use them whenever I turn on Multimedia keys in Synapse (without holding down FN xender). I have to pick between function keys and multimedia keys now. Is there a way to reverse this and change it back?