In searching, the internet seems very divided on this question. I want to achieve microwaving nirvana.
Edge of if I can.
There are always dead zones or lower power zones in a microwave. As the tray goes back and forth it turns around in circles it takes care if the problem. By going in and out of the zones.
I find it varies a bit to bit based on the microwave, but on average I get the most success by putting the plate in the middle of the microwave and arranging the food in a “donut” on the plate, it seems like the outsides of the plate if it’s in the middle do the best, probably because they get more rotation than the center.
The cold spots are kinda dependent on the internals of the microwave, so the only real way to know what works for you is to experiment, since even microwaves of the same make and model can have different cold spots.
Im of a “hill of beans” mindset on this.
The more movement the better. That’s why I only put live food in there /s