•‘ON/OFF’ key:
•Short press: Block/Unblock standby mode (turn off the screen and keys block)
•Long press: Device on + Shutdown/Block menu
•‘PAGE’ key:
•Short press: Data pages
•Long press: Main menu
•‘+’/’-’ keys:
•Short/Long press: Zoom+/Zoom-
NOTE: You can customize button functions in ‘Main menu > Settings > Full settings > System > Keys’.