USE AND FUNCTIONING133Function keys depending on the application program.Press this key to open the present menu.Press this key and move forwards or backwards with thearrow keys to open another menu.Toggles ALT Lock if pressed alone.Press this key and another key simultaneously to generatehidden characters (see the table in par. 3.5).A single press of this key equals the CapsLocks on a PCkeyboard.Press this key and another key simultaneously to generatehidden characters (see the table in par. 3.5).A short key press switches on/off the display backlight.Powers the terminal ON or OFF. To turn the terminal off thiskey must be pressed for one second and released.CAUTIONIf the [ON/OFF] key is pressed for 8 times the terminal will be reset.The RAM or clock settings will be erased.3.3.1 Scan ModeIf the Scan mode is selected (and the scanner is enabled as described in par. 3.2),the [SCAN] key functions as follows: the "navigation arrows" are used to browsebetween fields or in menus. Pressing this key in the middle activates the laserscanner or the RFID tag reader. Scan mode can be selected by the pressing the[ALT] + [F1] key sequence.3.3.2 Mouse ModeIf the Mouse Mode is selected, the [SCAN] key functions as a mouse cursor. Themouse cursor appears on the display and can be scrolled by the [SCAN] key arrows.Press this key in the middle to select an item (corresponding to a mouse click) ordouble press to launch an application. Mouse mode can be selected by the pressingthe [ALT] + [F1] key sequence.