IMPORTANT! Features placed in this section are those which may - or may not - become final features within Microsoft Flight Simulator. Using these features is done at your own risk as they may impact the stability of the simulation and the DevMode tools. This page documents the experimental features available to you within Microsoft Flight Simulator itself. These tools do not directly impact the creation of add-ons with the SDK or when DevMode is enabled, however they may still need to be taken into account and you should be aware that they exist and are available.


To find these features, you need to go to the General options, then select Experimental from the list on the left:

Where To Find The Experimental Features In The Simulation UI



  • Low Power Mode
    Enabling this option will lower the amount of screen refresh in the menus to save power.


  • NanoVG Mode
    This option will change the way XML gauges are rendered by the simulation, switching from the windows GDi render engine to NanoVG, which is the default on Xbox. This option is included to permit you to test that your XML gauges render correctly when the package is installed on an Xbox, and - in general - you should see little difference between the two render formats. It is worth noting that in the future NanoVG will be the default renderer for both platforms (PC and Xbox), so it's worthwhile testing your gauges even if you are not planning on releasing a package for Xbox.


  • Package Reorder Tool
    Enabling this option will open up the Package Reorder Tool window, which looks like this:
    Here you can re-order the package priority for most of the packages used by the simulation. Priority starts at 0 and increments, with the lower values being mounted first and the higher values being mounted after. This can be useful to debug issues where one package overrides or conflicts with the contents of another package, or when a package has dependencies on another package. Changing package order priority is as simple as clicking on the  and  buttons, and the priority value will be shown between the two. If you make a mistake, or wish to make a fresh start, you can click the Reset Order button, which will remove the file responsible for ordering the packages and then this file will be re-created when you start to change priorities again.
    IMPORTANT! Using the Reset Order button cannot be undone!When using the tool, it is worth noting the following:
    • Some packages will be flagged as Locked. These packages cannot have their priority changed.
    • Packages that are white have a priority set for them, and packages that are grey have no priority.
    • Package priority can be lower than 0 and go into the negative numbers, but the mount order will be the same, from lowest to highest priority.
    • Packages with the same priority will be mounted based on VFS order, but this is not guaranteed and may change in the future.


  • Add New Render Window
    This button permits you to add one or more additional render windows for the simulation, ideal for setting up multi-monitor displays. When you click the button, a new render window will be listed underneath with various options for positioning the window, setting resolution, and also setting the mode (fullscreen or windowed).
    New Render Window Options In The Simulation UI