How can I subtract from inside a vector mask?

[carbonfiberhoods.com]

I am trying to subtract from an enclosed vector but I cannot find an option to do this in Affinity Photo.  I can do this in PS CS5, I tried doing this in Affinity Photo but I do not see a subtract from mask option.  The window on the house vector is an example of what I am trying to accomplish, I watched all the vector cropping Affinity videos but I couldn't find anything about subtracting from a vector mask.  If you know how this can be done please let me know, thanks!

[R C-R]

6 hours ago, carbonfiberhoods.com said:

I am trying to subtract from an enclosed vector but I cannot find an option to do this in Affinity Photo.

You can do this using the boolean ("Geometry") options. Attached is an example house vector.afphoto file with a "(Curves)" object created by subtracting four rectangle shapes from the house shape, & a similar one with a "(Compound)" object made the same way except that the four rectangles were compounded by holding down the alt/option key & using boolean Add, & then subtracted from the house shape by holding down the alt/option key & using the boolean Subtract.