FabFilter

This seems like such a dumb question, but to use the EQ match function, you need to "Open FabFilter Pro-Q 2's interface and set Side Chain to Ext."
Where is this?!
I'm sure it's somewhere obvious and i'm looking straight at it, but i can't for the life of me find where to set the side chain.
Can anyone spell it out to me in the most idiot proof way possible?

Hi,

This is actually incorrect information in the help file -- we'll fix that right away. Pro-Q 2's side chain is always enabled, so you can just omit that step.

You can check whether the side chain is receiving audio by making sure the SC button is enabled in the analyzer options. It will draw as a light red curve.

Cheers,