Restore to factory settings
Complete restore to factory settings
iPad Air, iOS 8.1.3, Restore to factory settings
Apple Event: May 7th at 7 am PT
Complete restore to factory settings
iPad Air, iOS 8.1.3, Restore to factory settings
If you want to know how to reset to Factory Settings read this: Use iTunes to restore your iOS device to factory settings - Apple Support
If that's not your question then what is the question?
Are you asking how? What is your question?
To do this on the device itself:
Settings/General/Reset/Erase all Content and Settings
You'll need to disable Find my iPhone/iPad to do this.
The procedure will return the device to an out-of-box configuration when it has completed.
Restore to Factory Settings via iTunes reloads the iOS software. "Erase All Content and Settings" doesn't do that.
Restore to factory settings