 So you love deleting things. Not a problem. Delete face is really simple. When you left click a face it's going to delete whatever target you set. If you're on single poly it'll delete one poly. If you're on front facing it'll delete the front face. If you're on poly loop it'll delete that poly loop. If you're on poly group island it'll delete everything that is the same color. Hope that helps and as always I hope you have a fantastic day and I'll see you around.