Several ways to manage windows on OS X

1. Switch between different active windows of same application
Command-` (grave accent)

2. Minimize current window
Command-M

3. Enter and exit full screen
Command-Control-F

4. Close window
Command-W
or
Command-Q (always really quit application except Finder)

5. Hide other applications' window and keep focus window
Command-Option-H

6. Hide focus window
Command-H

7. Switch between different windows
Four fingers slide from bottom to top on touchpad and select the one you need.