Phillip Perin Yes when making multi range selections to quickly set borders, you now need to do those as separate steps. In your image this would mean a extra click. We tried to avoid impacts like this as much as we would but in some edge cases you might need to make extra clicks.
JC Kim I am not 100% sure why it is not showing for you yet, based on the build number it should, unless your an enterprise release channel. We roll this out in stages and this might take some time. Make sure that your version says "Office 365 Pro Plus" and not just "Office ProPlus". If all is good it should not take to long before it will start working. Nothing you will need to do from your side.
Naturally you can always join insiders to get features even sooner, but in this case that is not needed as we have rolled out to production.
Thanks,
Olaf