- 18 -3.8.3. Using the shift keyThe SF key is used in combination with other keys such as the numericalkeys or the power key for special purposes.When the SF key is pressed, the keypad is switched to the SF key mode.Refer to the BHT API Reference Manual or BHT Class Library ReferenceManual for further details.There are two SF key modes, “Nonlock mode” and “Onetime mode”.Nonlock mode: The keypad stays in the SF mode while the SF key is held down.Onetime mode: The keypad is in the SF mode only once each time the SF key is pressedThe default is “Nonlock mode”.The SF key mode can also be changed in the System Properties or with the user program.Refer to “6.4.5 Key “, the BHT API Reference Manual or the BHT Class Library Reference Manual for furtherdetails.3.8.4. Using the FN keyThe FN key is used to activate the function keys such as the F1 to F12keys that are printed in blue on the keypad. When the FN key is pressed,the keypad is switched to the FN key mode.There are two FN key modes –-“Lock mode (default )” and “Onetime lockmode”.For example;To use the F9 key, first press the FN key and then press the F1 key.In the lock mode, the F1 to F12 keys are activated until the FN key is pressed again.In the onetime lock mode, the F1 to F12 keys are activated only once each time the FN key is pressed.The FN key mode can also be changed in the System Properties or with the user program.Refer to “6.4.5 Key “, the BHT API Reference Manual or the BHT Class Library Reference Manual for furtherdetails.
