The best way is to simply press the 'Home' and 'Lock' buttons at the same time on your device to take a screenshot.
Some accounts may offer better screenshotting abilities.
v4.3.5 or later
Press the 'Home' and 'Lock' button at the same time to take a screenshot.
v4.3.3 - v4.3.4
Introduced new feature called "Screenshot Sharing". Take a screenshot anywhere in the app and you'll be presented with a sheet to share to various of social sites easily.
v4.2 - v4.3.2
Most of the built-in 'share sheet' has been removed due to the vast majority of users saving straight to their Camera Roll. The built-in "Export" function did not include a status bar and was just a blank area. By you, the users, taking a screenshot yourself the status bar is included, for better realism, and saves to your Camera Roll.
v4.2 or Earlier
Sharing the fake post is done in multiple ways so please read the tutorials.
(Home > Settings > Reset Tutorials)
Customer support service by UserEcho