Where do I find Brush Settings in UE4.7.2? Help!

Im new to UE4 and am currently using the 4.7.2 version, I cannot find the subtractive brush that would help me build windows and doors.
Please help me.

Hope that helps:

34097-subtract.gif

Thanks for the help but the thing is on the details bar, I do not have brush settings. I have tried to access it from the window menu but I couldnt find the brush settings there even!.The Foilage tab doesnt help either??
If you know more about this please help!

One more question? Are you using UE4.7.2?

Alright Thanks guys I figured it out. I was using the Basic tab instead of the BSP one.
Thanks for the help Martin. This thread is closed