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
What steps do I need to take to get a dimens.xml file with the swdp file naming convention?
First, you will probably be happier with life if you change the drop-down above your project tree from "Android" to "Project", which shows you an actual filesystem view of your project.
To add a resource directory from within Android Studio:
Right-click over res/
Choose New > "Android resource directory" from the context menu to bring up the New Resource Directory dialog:

Choose your resource type in the "Resource type" drop-down (in this case, values)
Click on your desired qualifier (in this case, "Smallest screen width") in the "Available qualifiers" list.
Click the >> button
In the field that appears, fill in your numeric value (in this case, 600)
Click OK to close the dialog and create the directory
To add dimens.xml to that directory, right-click over the newly-created directory and choose New > "Values resource file" from the context menu.