Where can I find the FSX manual and SDK documentation?
Find the FSX manual and Learning Center, get the right FSX SDK documentation or SP2 download, and fix common installation and CHM help errors.
Microsoft Flight Simulator X and FSX: Steam Edition use the built-in Learning Center as the main FSX manual; open it from the start screen or Help menu. For development, use the SDK documentation matching your FSX edition and update level, and install any required base SDK before its service-pack update.
Where is the FSX user manual?
The complete user guide supplied with FSX is the searchable Learning Center, not the brief booklet included with some boxed editions. Open it from the simulator’s main screen. During a flight, press Alt to reveal the menu bar, then open the Learning Center from the Help menu.
It covers aircraft operation, flight planning, navigation, ATC, weather, multiplayer, failures and simulator settings. For a particular default aircraft, also check its Learning Center article and the Checklist and Reference pages in the in-flight kneeboard. Add-on aircraft may have separate manuals supplied by their developers.
If you mainly need the controls rather than the full manual, our printable guide to the default FSX keyboard commands is easier to keep beside the simulator. Custom controller profiles and add-ons can override those assignments.
If the Learning Center link is missing or its pages do not load, repair the boxed installation or verify the Steam installation’s local files. The Learning Center is part of FSX itself; installing the SDK will not restore missing user-manual files.
Can I download the FSX Learning Center as a PDF?
FSX does not normally install the complete Learning Center as one PDF file. Its topics form an interconnected local help system with search, links and supporting media, so a PDF labelled as an “FSX manual” may contain only the shorter Getting Started booklet or a limited reference.
Use the built-in Learning Center when you need the whole manual. Individual topics can be printed from the help viewer on systems that expose a print command, but this does not preserve the complete index and search system.
Developer PDFs and SDK extracts are different documents. They describe content creation rather than how to fly or configure the simulator; they are not substitutes for an FSX Learning Center PDF.
Which FSX SDK documentation or SDK SP2 download do I need?
The correct FSX SDK is determined by the simulator version you are targeting, not by your version of Windows. The simulator service pack and the SDK service pack are separate installations: updating FSX to SP2 does not update or install the SDK.
| FSX target | SDK documentation and tools to use | Common mistake |
|---|---|---|
| Boxed Deluxe updated to SP2, without Acceleration | Install the base SDK from the Deluxe media, followed by the required SDK updates, including SDK SP1A before SDK SP2. | Treating the SDK SP2 package as a replacement for the missing base SDK. |
| Boxed Acceleration or Gold | Install the base Deluxe SDK, its prerequisite update, then the Acceleration SDK update from the relevant media. Use the Acceleration documentation for its added features. | Using only the SP2 SDK documentation when developing for Acceleration-specific features. |
| Boxed Standard | Standard did not include the original developer SDK. Documentation can still be consulted, but an SDK update may refuse to install without the Deluxe base SDK. | Assuming an SP1A or SP2 updater supplies the complete SDK. |
| FSX: Steam Edition | SP2 and Acceleration-era documentation remains the main technical reference for legacy FSX formats and APIs. | Legacy installers and tools may search for boxed-edition folders or registry entries instead of the Steam location. |
Our FSX SDK SP2 package with its official tools, templates and documentation is intended for SP2-era development. It is an SDK update rather than the FSX game, a user manual or a guaranteed standalone replacement for the base Deluxe SDK.
The installed help is organised into development areas such as:
- SimObject Creation Kit: aircraft, vehicles, models, animations and configuration data.
- Environment Kit: scenery, terrain and related world content.
- Mission Creation Kit: mission definitions, objects and actions.
- Core Utilities Kit: supporting APIs, utilities and development references.
How do I install and open the FSX SDK documentation?
Install the SDK components in version order, then open the compiled help files from the SDK directory rather than searching inside the main FSX game folder.
- Identify the target simulator. Confirm whether you are developing for boxed SP2, Acceleration, Gold or FSX: Steam Edition. Do not choose an SDK solely because its installer is the newest one you have.
- Install the prerequisites first. For boxed editions, begin with the base Deluxe SDK and apply the matching SDK updates in order. An error about a missing product or prerequisite commonly means the base SDK or an earlier update is absent.
- Locate the SDK folder. A default boxed installation on 64-bit Windows is often beneath
Program Files (x86)in a folder namedMicrosoft Flight Simulator X SDK. Custom and Steam-related installations may be elsewhere. - Open the local help. Look for an SDK documentation shortcut or search the SDK directory for files ending in
.chm. Keep the documentation with its neighbouring files so cross-references and supporting content continue to work. - Check the documentation version. If a documented tool, command or API is missing, confirm that the SDK update actually installed and that you have not opened an older help file left by a previous installation.
Why does the FSX SDK help open as a blank page?
A blank contents pane or empty topic page usually means Windows has blocked the downloaded .chm file or it is being opened from an untrusted location.
- Extract the complete download before opening the documentation; do not launch a help file from inside a compressed archive.
- Copy the extracted SDK documentation to a local drive rather than opening it from a network share or remote location.
- Right-click the
.chmfile, open Properties, and select Unblock if Windows displays that option. - If the table of contents appears but topics remain blank, move the complete documentation folder to a short local path and reopen the help file.
- If help opens correctly but tools are absent, check the installation order. Unblocking documentation cannot repair a missing base SDK or failed update.
Older installers can also fail because they expect boxed-edition paths or registry data. Our boxed-versus-Steam SDK installation and troubleshooting guide covers those edition-specific problems without requiring changes to the simulator itself.
If your immediate task is editing CameraDefinition entries, the camera-position reference extracted from the FSX SDK documentation provides a focused PDF without requiring the full help system.
The SDK is not required for normal FSX use
You do not need the SDK to fly in FSX, read the Learning Center or install most completed aircraft and scenery add-ons. It is a developer toolkit for creating, compiling or converting aircraft, scenery, missions, gauges and other simulator content.