Those two suggestions above allow for changing all the settings.
If you only need to change the A/C input there are a couple more choices. These choices can change the Ac input and change the state of the inverter/charger from On,Off, Inverter only, and Charger only.
1. Any GX device (Cerbo, Venus,CCGX).
2. VE.Bus smart dongle - this gives bluetooth for the Multiplus/Quattro. So you can change the settings on your phone.
3. Victron makes a DSU (Digital service unit) or something like that - it is a “control panel” for the inverter.
4. MK3-usb to a computer.
I have a GX device (CCGX), and I use this most of the time to change the settings. This is my recommended item.
I also got the VE.Bus Dongle and I do change the settings from my phone sometimes. I also like seeing the inverter in my item list - because it does show me the voltages.
I got the CCGX instead of the DSU and am very happy with that choice. The CCGX is an older piece - the Cerbo is the new fancy (and upgraded) item.
I have the MK3-USB I used it initially to program my Multiplus- you could change the AC input with this- if you only need to change it once in a while (like with a generator or grid) this would be ok - but because I full-time in an RV, I change the AC input settings a lot.
The Cerbo does LOTS more than just change the AC input too.
Good Luck