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Chatting while using wireless keyboard

Right now the fastest way to chat easily is uing a keyboard. The problem is when you have the chat up you still are required to press triangle to enter the chat and r2 to post the chat. Is there not a way to make the chat work better with the keyboard? I know I’m a whiny old gamer who would much rather hit the enter key to start typing my message as well as to post it.

Or is it possible to map the triangle and r2 setting to any standalone wireless keyboard?