Many Tricks, itunes.apple.com
Cover up your screen with an image or solid colour; choose which components are visible
Choosing solid colours is a little counter-intuitive
If you frequently take screenshots, Desktop Curtain helps make them cleaner. It lets you place a backdrop behind what you capture, instantly obscuring the clutter on your desktop.
Desktop Curtain can sit in the Dock, appear only in the menu bar, or even run as a ‘faceless’ application. Whichever mode you opt for, you use the tool’s preferences window to choose your preferred background. You can drag an image into the image well, or use the Choose pop-up menu to pick a default image (a curtain), the OS X default desktop, or any image on your Mac.
If you’d rather use a solid background, that will require a couple more clicks. You choose the desired colour by clicking the small colour button in the preview area. This brings up OS X’s standard colour picker.
Using the program’s menu or a keyboard shortcut, you can instantly hide or show the Desktop Curtain background. You can also choose how the curtain behaves: as a normal window (so it can sit in front of, between, or behind other windows), as a desktop cover (so it covers everything on your desktop but stays behind windows), or as a desktop background (so you continue to see all windows and anything on your desktop). If you have multiple displays or use OS X’s Spaces, you can choose which screens and workspaces the curtain appears in.
Macworld Buying Advice
Desktop Curtain is ideal for staging screenshots, helping you focus on a single program, or for presentations.