Index -> Interface -> Lobby Chat -> Additional Commands
In any chat window, you may also use the following keys:
Up Arrow and Down Arrow: Scroll through the previous messages you have typed.
Left Arrow and Right Arrow: Move the cursor left or right within the message you are currently typing.
Home and End: Move the cursor to the beginning or end of the message you are currently typing.
Shift-Left Arrow and Shift-Right Arrow: Highlight text to the left or right of the cursor. (You can also highlight text using the mouse.)
Ctrl-C: Copy the currently highlighted text.
Ctrl-X: Cut the currently highlighted text.
Ctrl-V: Paste the currently highlighted text.
