Keyboard shortcuts CTRL + Mouse up/down: Change the font size in a conversation window. CTRL + E: Center text CTRL + R: Right justify text CTRL + L or CTRL+J: Left justify text F9: Open Gmail to send an email to the person you talk to F11: Start a call F12: Stop the current call ESC: Close the current window To switch between multiple chat windows, press Ctrl+Tab. Emoticons Face emoticons (smiley faces...