Android Studio Function usage tips shortcut keys

See a lot of said with F2, wandering, the atmosphere of Chinese community probably so, you copy me, I super you.

The following uniformity:
"The suspension window does not come out, all kinds of not accustomed ah." So how does Android studio look at the description of the function? Check the functions you want to see, such as I want to check

Look at the below function instructions, first select, then press F2, quack, the suspension window is out. "

After seeing a few, the heart scold, karma your sister's.

Actually I used, F2 is useless, but alt+f7.

Android Studio Function usage tips shortcut keys