How can make my mipmap subfolder auto folding in Android Studio?

Question

The following is my android studio, and you can see the mipmap-*dpi folder is not folding.

here is the folding style:

i use android studio for a long time, but i still don't know how to fold it, so sad.

Answer 1

There is a drop down menu at the top of projects window.

You are currently in Project view. Choose Android view to get the style you need.