I can't rotate the android's AVD using the shortcuts like here,or here, or here
I've tried:   Ctrl + F12 Ctrl + F11
 NumPad On/Off 7 / 9 and other options from the above links.
Does anyone know what else can I try?
  Just a note: I don't want to click in the side options, I am looking for keyboard shortcut only. 
Thanks!!
Since some version of Android emulator (recently, like 27.0.0 or so) it is possible to restart the emulator with Ctrl key (Ctrl for Mac) + left arrow or right arrow. So:
Ctrl + (Left Arrow OR Right Arrow).
You can also modify the shortcuts in here:

If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With