I "professionally" (snicker) handwrote on relevant information.
As an example, I included our wall-to-wall on Facebook, which includes our mutual friends. I labeled anyone I discussed at any point in the application - especially his sister and her kids, because they a different last name (sister's husband).
My "additional" pages were 1 document. It looked kinda like this:
IMM 5490
Question 2: "Additional info"
Question 8: "Additional info"