Generally co-workers in office stop by your desk to seek some help or to throw some questions. That time you might be busy in middle of something and don’t want the person to see what is going on your screen. The general thing we do in such instances is, minimize all windows; but if you have some items on desktop, they are still visible to your visitor. So, now what should one do to blank the screen without disturbing the work?
I came across a nice utility (blacktop) which can be of some help here. This makes the screen blank with ctrl+alt+b key combination. Though using the key combination is bit difficult, I felt is useful.