@"erica-m3" hey i have the same worry but i'm going to print mine out with colour to avoid the shadows in my photo (which i also took on my iPhone). i think colour will produce a better outcome. hope it helps.
They will provide it for you and there is an example on the LSAC website. It is a large print format. If you were approved for your test booklet then you just mark in that only.
you'll be walked through everything prior to the test. just take your ticket and that's all you need along with the test booklet that they give you in order to fill out the stuff they want you to.
It's like that for everyone, I believe. The two times I took the test, my ticket only says the building and when I checked in, they told me where to go. Don't worry about it.
Blue print also has PTs on their site. As long as they're not in pdf form you're fine -- but they can still be digital. I know people download the exams and then convert them to PDF though I'm sure that's not legal lol.