View the chart below for information on common files used by FSX and how to view or edit them.
| File Extension | File Type | Relation to FSX | Program |
| .air | Air Config File | Controls how the airplane flys. | AirEd |
| .fx | Effect File | Could be a smoke effect, afterburner, wing vapor, etc. | notepad, or other text editor |
| .cfg | Configuration File | A configuration file for an aircraft, camera, scenery, etc. | notepad, or other text editor |
| .xml | Extensible Markup Language | Typically a supporting file for a gauge, or flightplan or scenery data. | notepad, or other text editor |
| .bgl | Scenery File | Scenery file for FSX. You can export to a bgl, but cannot open it up with anything. | NA |
| .bmp | Texture File | Texture file for aircraft. Typically used in third party aircraft. Some .bmp textures are extended bitmaps, and require specials programs to view them. If windows explorer does not generate a thumbnail for the file, or Windows Photo Viewer cannot open it, it is mostly likely an extended bmp. | Bitmap: Any Image Editor ex. Photoshop, GIMP Extended Bitmap: DXTBmp |
| .dds | Texture File | Texture file for aircraft. All stock aircraft use .dds textures. | Image Editor: ex. IrfanView, DXTBmp, Photoshop (with plugin) |