Thanks for your replies and the information. I don't know how to write this any clearer....but I will try again.
I'm trying to avoid entering through the main gate for two reasons 1) to avoid a lot of walking and I want to start at the Nasrid palace. 2) to enter through the Puerta Jusiticia to avoid waiting in line to show our passports to get in.
I found a current post on TripAdvisor and you have to show your passport upon entry and it looks like you can do that at the Puerta Justicia whereas maybe you couldn't at the time my book was printed in 2018? But in that book, it states that in order to enter through the Puerta Justicia you have to REPRINT your tickets in town. It doesn't say why but maybe you don't have to these days and that Q code is all you need. Otherwise you do that at the main gate which I don't want to do.
https://www.tripadvisor.com/ShowTopic-g187441-i416-k14377995-Passports_at_the_Alhambra-Granada_Province_of_Granada_Andalucia.html
Interestingly, since I speak Spanish I usually read the websites in Spanish. But curiously, they say in Spanish that it's necessary to show your passport but there is nothing about that when I flip to English. 🤔 (okay, maybe only interesting to me, ha)
This is why I asked if anyone has been there recently and gone through the Puerta Justicia and how did that work.