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Owner info: select "Owner info" and enter the owner info of the tablet,
tick on the selection "Show owner info on lock screen", then your
owner info will be displayed on each lock screen.
Make password visible: select to make your password visible when you
input the password.
Device administrators: view or deactivate device administrators.
Unknown sources: select to allow installation of apps from unknown
sources.
Verify apps: disallow or warn before installation of apps that may cause
harm to the tablet.
Trusted credentials: tap on it to see a list of trusted CA certificates.
Install from SD card: install certificates from SD card.