Arabic keyboard - FAQ:

Press the ARABIC/ENGLISH button on the Arabic Keyboard layout to toggle between the virtual QWERTY keyboard and the virtual Arabic keyboard. This key also activates/deactivates the keyboard input conversion feature.

1: Click the Shift button to reveal additional Arabic letters and symbols on the Arabic keyboard layout. This includes various forms of diacritics (chakl or shakl) such as fatha, altanwinu, alkisrata, alsskun, aldama...

2: Click on Shift to make the other English letters and symbols visible.