Hi. Welcome to the Apple Discussions.
The
DevMode Widget will enable you to do this. Just turn on Developer Mode from the Widget.
To bring it out of the Dashboard, follow these instructions (the widgets will stay in front of ALL other windows):
1. Make sure the DevMode widget show the green 'On' icon
2. Press the Dashboard activation key (F12 by default)
3. Click and hold the primary mouse button on any widget you have open in the dashboard layer
4. Press the Dashboard activation key again while still holding that mouse button
5. Now you may release the mouse button and the widget will stay on the desktop
If you don't want to use the DevMode Widget, you can also enable developer mode from the Terminal using this command: *defaults write com.apple.dashboard devmode YES*