You can take screenshots on the Samsung Galaxy S i9000 smartphone with a simple keystroke.
1. Navigate to the screen you want to capture.
2. Press and hold the Escape/Back button, then press the Home button (in some cases you may have to press Home twice for it to register).
3. A shutter click sound should be heard to confirm the shot was taken.
4. Open the Gallery app.
5. A folder named ScreenCapture will be available and contain your screenshot image.