Lenovo A269i uses Android Gingerbread v2.3. This Android version does not have built in provision of a screenshot. So Screenshot can not be taken on Lenovo A269i.
If you have rooted the phone, you may find some third party apps to take a screenshot, but you can not take a screenshot on the Lenovo A269i out of the box.
On other phones with newer android versions you may try this to take a screen shot.
Press and hold "Power Button" and "Volume Down" keys at the same time. It should take a snapshot with visual indication as well as sound.
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