How does one get dimens.xml (sw600dp) into Android Studio?

Question

I inherited the values folder structure shown below.

For over an hour I\'ve Googled and looked and pulled down menus in Android Studio 1.2.2 an

Answer 1

I have had MANY failures trying to do stuff OUTSIDE Android Studio, but this time I got away with it:

I will now see how @Commonsware says I could have done it.

EDIT

And as always, @Commonsware bailed me out with good advice (I have no idea when or why or how I lost the File structure "tab" along the left margin).

Here's what I now see, and (I was right:) it's NOT hard to see what to do ONCE YOU SEE THIS:

And, following his advice, I get to here and am ready to create the dimens.xml file that goes inside: