Add Z home ONLY in LCD

Is there a way to add feature to LCD controller to home Z axis only ?

 

I think i got it.
New line that needs to be added is in BOLD RED text

2 files need change.

Edit language.h file
Look for line
#if LANGUAGE_CHOICE == 1
This line stands for English

#define MSG_AUTO_HOME "Auto home"
#define MSG_AUTO_HOMEZ "Home Z Only."


Edit ultralcd.cpp

MENU_ITEM(gcode, MSG_AUTO_HOME, PSTR("G28"));
//MENU_ITEM(gcode, MSG_SET_ORIGINZ, PSTR("G92 Z0"));
MENU_ITEM(gcode, MSG_AUTO_HOMEZ, PSTR("G28 Z0"));
//MENU_ITEM(gcode, MSG_SET_ORIGIN, PSTR("G92 X0 Y0 Z0"));

}
if (REPRAPWORLD_KEYPAD_MOVE_HOME) {
reprapworld_keypad_move_home();
if (REPRAPWORLD_KEYPAD_MOVE_HOMEZ) {
reprapworld_keypad_move_homeZ();
}

}
static void reprapworld_keypad_move_home() {
enquecommand_P((PSTR("G28"))); // move all axis home
static void reprapworld_keypad_move_homeZ() {
enquecommand_P((PSTR("G28 Z0"))); // move Z axis home
}