You can adjust settings for a USB keyboard or a Bluetooth® keyboard that is connected to the PS4™ system. Select [Devices] > [External Keyboard].
You can set the type of external keyboard.
You can set the input method for an external keyboard. This item is displayed only when [Japanese] or [Chinese (Traditional)] is selected for [Type].
Key Repeat (Delay)
You can set the amount of time before a character is repeated when a key is held down on an external keyboard.
Key Repeat (Rate)
You can set the speed at which a character is repeated when a key is held down on an external keyboard.