You switch the setting to 'or' and make sure that the brightness is at medium pink and then shine the nerd.
The first noticeable change is the reducing amount of fat and the curves becoming real. The nerd's more or less uncared for and greasy hair becomes healthy and starts growing longer.
His clothes become loose and baggy and the angled perspective that you see Sam makes the growing breasts more apparent and 'his' face becoming increasingly feminine.
Sam's unimpressive height becomes even more unimpressive at around 5'1.
You decide that the nerd is now adequately physically changed and change the settings to 'in' and low pink.
Sam's Dungeons & Dragons T-shirt becomes a more feminine and form fitting version, his tracksuit trousers do the same. You can barely see it but you think that his boxers have also become the feminine version. His glasses also become more feminine and rounded. You stop before they become the 'triggered' glasses that SJW's wear. The one thing that Sam, thankfully, wasn't.
For your final change, you set it to 'sp' and strong blue. You were sure male Sam was at least asexual before and now female Sam is almost certainly straight.
Noticing in her peripheral vision that you are still there, she says in undoubtedly feminine but very monotone voice, "Get back your dorm room, jackass."
Shrugging, you turn around and head back inside. You remember that you are half naked and decide to put some pants on when you hear...