Copying the text from that link:
- Right-click the panel you wish to move and select “Properties”.
- Uncheck the “Expand” option under the “General” tab.
- Grab one of the edges of the panel by clicking on the left or right end (top or bottom end for vertical panels).
- Drag the bar to the desired screen and position.
- Check the “Expand” option in the “Panel Properties” window and click “Close”.