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Sitting alongside the infrared sensor is another kind of sensor, an ambient light one. This, when enabled, will automatically adjust the brightness of the display to suit the conditions, so you needn't be blinded when the lights are off. It also means your monitor won't use more power than it strictly needs; there's even a power metre (titled EcoView Index on the remote) that appears in the bottom right corner to give you a rough idea how energy efficient the settings you're using are.
While there is a large number of settings accessible through the OSD, a few are only accessible via the remote. This includes another of the FX2431's entertainment orientated features, the Thru mode. This disables some of the display's image processing, reducing perceived 'input lag' to 1/60th of a second - around 16ms. This is either a good or a bad thing depending on your point of view: good, because it might give you the upper-hand in combat; bad, because you'll have no excuses if you lose!
Another gaming related function is the Size button, which gives you control over how the monitor scales content. There are numerous options available depending on the source and resolution, but the main thing to know is that the FX2431 fully supports 1:1 pixel mapping and scaling without distortion, so any 16:9 aspect sources (such as 1080p signals from a Blu-ray player or gaming console) will be displayed without being stretched.
This also applies to standard definition games content from previous generation consoles (even a PSP), which is upconverted with minimal loss of fidelity and no distortion. There's even a special 8-bit game mode called Real Image, which reduces blur when playing old 2D sprite based games. All fairly niche features, but if you're a gaming nut who has a large collection of consoles (old and new) then these features may appeal.
Also accessible via the remote is a full set of picture-in-picture options. You can adjust the position, switch to full-screen mode and toggle which input drives the integrated speakers. These are superior to your typical monitor efforts, proving more than good enough for watching TV on or casual music listening, but distortion does creep in at high volumes - especially when big explosions kick-in. You can control the balance, treble and bass from the 'Sound' menu in the OSD, as well as options for Bass Boost and a Stereo Expander, both of which are relatively effective.
Colour controls on the FX2431 are numerous. There are numerous presets, comprising Text, Picture, Movie and Game modes. Alongside the usual brightness and contrast controls, you can also adjust the black level (RGB), saturation and hue, while colour temperature options range from 4,000K to 10,000K. Under an Advanced Settings menu there are further options, including a toggle for the dynamic contrast mode (labelled 'ContrastEnhancer'), edge enhancement (OutlineEnhancer) as well as controls for gamma and gain.