Flight Simulator X is known for its extensive modding community. There are many freeware and payware add-ons available. Be cautious when installing and research other users experiences along with check for compatibility with other addons you may have.
%USERPROFILE%\My Pictures\Flight Simulator X Files\
In-game advanced video settings (Graphics).
In-game advanced video settings (Aircraft).
In-game advanced video settings (Scenery).
In-game advanced video settings (Weather).
In-game advanced video settings (Traffic).
In-game key/button remap settings.
In-game axes remap settings.
In-game force feedback settings.
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Open the configuration file (.cfg) and add the following:
Open the configuration file (.cfg) and change the following lines from True to False:
Open the configuration file (.cfg) and change the following line to 2048 or 4096 to use higher resolution textures.
Open the configuration file (.cfg) and add the following lines to the [TERRAIN] section. The default values are as shown.
Open the configuration file (.cfg) and add the following to increase CPU time dedicated to loading scenery data: