Adding shot marks
From [MENU] → [SYSTEM SETTINGS] → [USER SWITCHES], set [SHOT MARK] for any setting from [USER1] to [USER4].
During recording or while a clip is selected in the PLAY screen, press the button to which the shot mark is assigned.
[MARK ON] is displayed, and the short mark is added to the recorded clip.
Another press of the button displays [MARK OFF] and the shot mark disappears.