Adding The Design Support Library

I use android studio 3.5, and the only way I've found through searching to add a library is via the project structure in android studio or directly downloading a .jar and adding it

Solution 1:

It's available in Build > Edit Libraries and Dependencies (see the top bar).

Have a look at this -> https://images.app.goo.gl/STfMX9zTy3ZMQG7r5