How to draw a hole in Free!ship?

I am wondering if anyone can tell me how to draw a hole in a surface in freeship to depict windows and portholes. At present I have just made window shaped layers and made them transparent, but I am sure this is the hard way!

 

Well, windows and portholes in reality are clear glass.... what's wrong with modelling them as such?

 

so I'm on the right track?

 

If you want a true hole (no glass) you can simply delete a face from the object you're modelling (select the face, then hit CTRL-X).

As you probably know, it's quite easy to create smaller faces within an existing face. Just split existing edges on a face and insert new edges between the new points. Once you've made a smaller face, it's a simple matter to delete it, creating a hole in your centerboard trunk, gooseneck fitting, or whatever.

 

Thanks Bruce, that has worked well.