As a test in the metrology class we had to setup the scope entirely without triggering and then hit run once to get a perfect, single cycle filling all the screen. It was an easy signal to trigger as a low noise sine wave or something. For many was hard as shit and they were asking in the hall how to do so.
Now, today I was trying to trigger a data bus to identify the traces (many data bus on a single flat ribbon so hard to tell which was which before hand) triggering one of the signals as reference was hard enough with advanced trigger options but I got a reasonable steady signal in the screen and I was able do distinguish the independent sync data lines. Now, learn how to use the scope, know where all the tweaks are and how to use them one by one. Having a signal gen helps (your phone would do, I can recomend an app) so you can trigger the signal when you need it. Edge triggering is usually not enough and auto will have quite a hard time to deal with that. Also, you need to know the acquire mode the scope scope is in or you'll trip more than once thinking your signal is something that isn't. As a rule of thumb I always start with normal and if I see a certain type of consistency and need lower noise I'd switch to a more convenient one. DS1054Z is a powerful modern scope, has almost as many options as there is for one, but learning how they work is useful and pays back quite fast.
JS