You cannot select the Undock View feature in Flight Simulator 2004

This is an article from the Microsoft support website featuring information on how to fix the Undock View option to make it usable.

Symptom

When you start Microsoft Flight Simulator 2004 - A Century of Flight, you cannot select the Undock View feature and configure multiple monitors.

Cause

This problem occurs if you run Flight Simulator 2004 in full-screen mode.

Solution

To work around this issue, run Flight Simulator 2004 in a window. To run Flight Simulator 2004 in a window and to configure multiple monitors, follow these steps:

1. Start Flight Simulator 2004.
2. When you are in the cockpit, click Views, and then click Full Screen.
   
   Note You can also press ALT+ENTER to switch between full-screen and window modes.
3. On the Views menu, click Undock View.
4. Click the title bar of the undocked view and use a drag-and-drop operation to move the view to the monitor where you want the view.
5. Configure each monitor to display Flight Simulator in full-screen or window mode.

Note Multiple full-screen setups are not saved in Flight Simulator 2004 or in flight configuration (.cfg) files. You can save a flight while each display is in windowed mode, and then switch to full-screen mode after you start Flight Simulator 2004.