I recently installed xmonad on Ubuntu 12.04.3 Precise Pangolin and the default keybindings are mod-w to switch to monitor 0 and mod-e to switch to monitor 1.
Unfortunately my monitors are positioned in the opposite order on my desk, with the left monitor being 1 and the middle monitor being 0. Changing cables won't work since the left monitor will not preserve its maximum resolution of 1920x1200 on VGA (I only have 1 HDMI port and it's using it), even though I tried to install that new mode several times with xrandr --addmode etc.
While I could technically physically swap the position of the monitors on my desk, or swap the xmonad keybindings, I'd love to know if there's a way to swap monitor numbers within X to achieve a similar effect. I haven't managed to find anything on Google, so I'm hoping folks here might know. Thank you!