A typo, I've since corrected. It's RD trim and yes it's related to the rear derailleur. As I said you have two separate issues, one in front and one in the rear. By trim I mean the centering of the chain on each sprocket. It's adjusted by the threaded barrel that adjusts cable length. But there are other adjustments, some of which are critical to prevent something like the derailleur from going into the spokes.

The front derailleur also needs adjusting to prevent the chain from dropping. There are too many possibilities to go into here which is why I sent you to tutorials.

Overall the bike seems to be very poorly assembled, and just solving the obvious problems won't address the unknown ones. Even if I had the time to walk you through quick fixes, it would be a disservice.

You have 2 choices, either bring it back and have it thoroughly checked over the way it shoild have been before they gave it to you. Or look up various tutorials for derailleur setup and adjustment and study a few until you have a sense of what's involved, then do a complete setup and adjustment process from the beginning, checking and correcting, if needed, every detail of the assembly and adjustment.