I'm not certain there are APA guidelines for session notes, treatment plans, or termination summaries either. The same professor will critique and dock you for taking the same "creative" measures.
😉
I think certain margins, line spacing, etc. is fairly standard for most folks and trying to get around that is going to be noticeable to some folks. If you want to take that chance, then so be it. I admittedly have done so myself in the past... Until I started meeting folks who noticed these things and mentioned that they usually do not look fondly upon those who take these shortcuts. However, if you happen to be caught, so to speak, and it
is held against you, then don't start griping about the unfairness of it when you know good & well that you had the opportunity to change it ahead of time.
Find another way. You're not always going to be able to get around or get away with them, so you may as well get some practice in and start getting used to them now.
And, FTR, I (and most other folks) actually love this professor. He is beyond awesome. He knows his **** from research to the clinical realm, and you learn a lot from him. He is simply more than a bit detail-oriented about things, and he will call your attention to it. In the end, although some folks do complain, his suggestions do improve your work.
(Even though I still b*tch at those page limits regardless of whether they're for CVs, papers, or clients' paperwork...

)