Retripie: How to save and load?

[Porcinus]

In Retroarch:
Enter hotkey mode, slide power slider once if you don't have addon board, hold hotkey button if you have it and press
- Dpad left : switch lower slot
- Dpad right : switch higher slot
- L1 : load
- R1 : save
- Y : open menu

For the other emulators, IDK :S