Getting Familiarized with the SIMATIC Field PG P42-10 SIMATIC Field PG P4 ManualA5E00180080-04Special KeysThe special keys in the alphanumeric keyboard have the following functions:Key FunctionBackspace keyThis key moves the cursor one space to the left and deletes the character atthis position.EnterEnter Key(Return, Enter, Line Feed (“New Line”)The return or enter key is used mainly to terminate a command line in theoperating system; that is, the command you have entered is executed whenyou press this key. For other uses of this key, please refer to the usermanual of the relevant user program.CapsLockCAPS LOCK KeyIf you press this key, the middle LED at the top right-hand corner of yourkeyboard lights up. All letters are output as upper case letters and the num-bers as special characters. If you want to type lower case letters in thisposition, you must first press the shift key.If you are using an international keyboard, you cancel this function bypressing the CAPS LOCK key again. The LED then goes out.If you have a German keyboard, you must press the shift $ key to cancelthis function.Num NUM KeyWith these keys Fn + ^ NUM , the emulated numeric block is switched fromthe alphanumeric keyboard to numeric keys. The LED display lights up.Press this key again to return to cursor control.Scroll Scroll-Lock-TasteMonitor scrolling is either enabled or disabled with this key.Tab KeyThis moves the cursor depending on the selected tabulator positions.Fn“Fn” Special Key (combination key)In conjunction with a second key (key combination), you activate other keycodes for special applications with this key. This key is also used to emulatethe numeric keypad (Figure 2-3 Numeric Keypad).CtrlCTRL Key (combination key)This key is only used in combination with other keys. For example, youpress CTRL + ALT + Delete to reset and restart the operating system. Forother uses of this key, please refer to the user manual of the relevant userprogram.