Before launching your application make sure your HTC Vive is plugged in and ready for using. Desktop VR mode will not work if SteamVR is not opened. The SteamVR plugin should look as follows:
Close any other software (Revit, AutoCAD, Photoshop, Excel, etc) to improve performance.
Open your project's Desktop app and hover over the VR icon in the top right to make sure the Vive has been detected. If the icon indicates that the headset was not detected, close the desktop app and follow the steps described above.
To enter VR mode, click the VR icon in the top-right and put on your headset. You are now ready to explore your model using your HTC Vive! The desktop application will mirror what you see in VR on the screen.
To exit VR mode, remove the headset and click the VR icon.
You can teleport around the model by pressing the trigger on the right controller and aiming where you want to teleport to. An icon will indicate where you will teleport to. Release the trigger to teleport there.
Click the touchpad to switch between Views.
Pressing the trigger in the left controller lets you draw in the scene.