A:Answer With difficulty.
If you've looked at the literature that accompanies the refrigerator, you will have noticed a certain vagueness when it comes to temperature adjustment.
Here's how we did it: look at the control panel at the bottom of the upper left door. There's a far right button that says, among other things, "hold for 3 seconds". If you do that, you'll see the lights displaying the 3 temperature settings start flashing. Select the one that corresponds to the one you want to change (refrigerator is 3rd from left), and press it.
Here's where the uncertainty comes in. We've tried pressing and holding the temperature setting, and we've tried repeatedly pushing it. Eventually one or the other works, but you won't see a result until you stop and let it "think" about it. One time, our temp went up 4 degrees. The other time we tried, it went down 2. You have to work with it, and have more patience than we do. We finally have it with a temp range of 36-40 (we have a small in-refrigerator thermometer) and we're letting well enough alone.
Other than the difficulty adjusting the temperature (which is more a case of our ignorance and not the refrigerator's fault), the refrigerator seems to be working well.