I have inherited the values folder structure shown below.

For more than an hour, I searched Google and looked and shot the menu in Android Studio 1.2.2 and tried to create files and folders, but nothing I did allows me to add, for example, dimens.xml (sw720dp) .
I removed the dimens.xml (sw720dp - landscape) because landscape did not fit my needs.
What steps did the one who created the folder structure take in order to get the dimens.xml (sw600dp) to display in the structure?
What steps need to be taken to get the file dimens.xml using the sw<N>dp file naming convention? How do I get the dimens.xml (sw720dp) where does it belong?
You can ignore the rest of this. I just show that I have TRIED, none of which work correctly.
Should I right-click values or dimens.xml (2) ? What then?
Here is what I did and it did not help:

I also tried:

EDIT
I also tried copying the sw600dp file. Bad luck:

IT CANNOT BE IT SAME.
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