Translations:Android Tutorial for DDNet 9.3.1/21/en

The name of the button being mapped is on the top. You don't need to care about its usage according to its name. Also, the button usually have a default mapping. We recommend to map buttons to A, D, SPACE, X, PAGEDOWN. That's because A,D,Space have already been bound by default, meaning you don't have to bind them again if you map the button to keys that have been bound already.