1.Taking Screen shots without any 3rd party software
just hold Lock, Volume up & Back button at once
Home screens
If you're upgrading to Android 4.0 from Gingerbread (Android 2.3), note the following changes in the way the Android 4.0 Home screens work:
| Action | Android 2.3 | Android 4.0 |
|---|---|---|
| Change wallpaper. | Touch Menu > Wallpaper. | Touch & hold an empty location on a Home screen, or touch Menu > Wallpaper. |
| Add a widget to the Home screen. | Touch & hold an empty location on a Home screen, or touch Menu > Add. | On any Home screen, touch the All Apps icon  . Then touch the Widgets tab and touch & hold a widget. |
| Scroll through your apps or widgets. | Swipe up or down. | Swipe left or right. |
| View recent apps. | Touch & hold the Home button. Icons for recent apps appear. | Touch & hold the Home button. Icons and thumbnails for recent apps appear. |
| View or edit your contacts. | Open the Contacts app. | Open the People app, which provides improved integration with Gmail, Email, Google+, and other apps. |
| Create folders. | Touch & hold an empty location on the Home screen, and go to Folders > Select folder. | Drag and drop apps, contacts, and more on top of each other to create a new folder. |
Lock screen
The way the lock screen works has changed. To answer an incoming call, drag the lock icon to the right. For more details, see Answer or divert calls.
Swipes
Android 4.0 includes many new features, most of which are described in other Help topics. Note especially the use of left-right swipes. For example, you can swipe sideways to:
- Dismiss notifications.
- Dismiss recent app thumbnails.
- Move forward or backward through email messages in your Inbox.
- Check recent Google+ posts from the People app.
Screenshots
You can now easily capture screenshots directly on your phone: press Power and Volume (Down) simultaneously. The screenshot is saved automatically, and the Screenshot icon appears in your status bar. Touch the notification to view your screenshot in Gallery.
