To take a screen shot on a iPhone or iPod Touch (2g) press down the Home button and then press the Sleep/Wake button (you can also reverse this and press Sleep/Wake button and then the Home button).
The screen flashes and an image is captured and stored in Photos/Saved Photos on the Touch and in Camera Roll on the iPhone. When you next sync with the computer you can remove the screen shots.
Certain uses and applications may eat power limiting the use of your iPhone or Touch. However, the device will ensure that power is not wasted by automatically shutting down unnecessary applications.
It is possible to extend battery life to Apple's suggested figure of 22-hours on the iPod Touch by demobilising or limiting the use of Wi-Fi; or for that matter any of the three accelerometers and finally the GPS (iPhone only)
Use an image package such as Preview which comes with Macs. Draw a rectangle over an image approximate in size. Then go to 'Tools' and 'Adjust Size'. Make sure you uncheck 'Scale Proportionally' and then correct the dimensions to 320 x 480.
Simply tap and hold your finger down on the app you want to delete. The app will start to wiggle and a cross in the top-left hand corner will appear. Simply, tap again. An option to confirm your action will appear. Confirm delete. Another option will appear to possibly rate the app (you can participate or not, your choice). The app is then deleted.
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