Reverse Monochrome for the gallery on the homepage.

The theme instructions seem to be missing for Bold Photography Pro. I can only seem to get to the FAQ's. I can't find the setting for Reverse Monochrome for the gallery on the homepage. (The transition on a mouse hover on the front page.) Can someone provide direction on how to find this setting? I feel like I've gone over every setting multiple times and I'm just glossing over it at this point. Appreciate your time, Jim