I positioned the Pan and Crop window so high, that I can not see the top of it and I can't drag it down or take it off the top of the timeline or resize it. How can I bring it down, or make it smaller?
Try changing your display resolution to something bigger - if you're currently running at 1024x768, change it to 1600 x 1280. You should then be able to move the Pan/Crop window back down and then change your resolution back.
If it's above the top, it will still be above the top no matter what resolution the screen is set for. Increasing the resolution will only helps if the window is lost off the right side or the bottom side.
Try this: assuming the Pan/Crop window is the currently active window (it should be if you've just clicked the Pan/Crop icon in an event), press Alt-spacebar to open up the control menu for the window. Type M to select the Move command. Use the arrow keys to move the window back onto the desktop. Press Esc to exit the Move command.
Dockable windows in Vegas behave much like regular application windows.
What this means in this case is that you have a simple way to move the window:
1. Press "Alt+Space"
2. Press "M" (for "Move")
3. Press the down arrow key (or any arrow key)
4. Move your mouse if you want to move the window more quickly.
5. Pressing "Enter" or left-clicking will set your new window position. Hitting "Esc" will cancel your movement.