There are times when a modal dialog does not appear in the active window and is hidden off screen. For example the shipping schedules window is not visible after selecting Assign Schedule. This is especially common with laptop users.
To solve this problem:
- Hold down the ALT key.
- Press SPACEBAR and the M key.
- Release all 3 keys.
- A 4-headed arrow will appear. When it does, use your arrow keys to move the outline of the window.
- When you are happy with its position, press ENTER.
If this doesn't work try plugging in a second monitor and extend the display to this additional monitor. Normally this will show the missing window so you can drag it back onto the main desktop. The problem normally occurs when a change has been made from a multi-monitor setup to a single monitor.