And we had these lovely shots as an example
It's only a two-part process!
Part 1: From the Edit menu, select the Adjust widget
See that little eyedropper [just to the left of tint]? Click on it. Then click on something that is suppose to be white or grey white in your picture. I chose the white bedsheet-slipcover on the chair.
You'll get something like this
(the second pic in yesterday's post)
Improved, but we can do even better
Part 2: Your Adjust widget should look something like this [I also increased the exposure]:
Now we're going to play with Temperature and Tint [found in the lower 1/3 of the menu]. Just nudge the sliders until you find a pleasing combination.