Welcome to Behringer. They don't have the details themselves, as they "borrow" technology from other companies and mass produce it.It is not an "intelligent" unit. Meaning, you pretty much have to know what you have, and what you need to get a desired result. The RTA and the EQ screens are not imposable. There is a feature to import the analyzer settings to the EQ.
Measure the room from three distances (close, mid and far field), left, center and right. What is good at the mix position may not be good for everyone. Also, do not rely on the feedback eliminator. If you are maxing it out, you will lose headroom, as the number of bits used goes up, and fidelity will crap out. People had no feedback elimination for 50 years and they did fine. It's all in speaker position, mic polar pattern selection and gain (acoustic and elctronic).
Good luck with the Behringer. I installed many of it's predecessors in low-budget installs, and they are still working great.