例1
screen notify(message): zorder 100 if renpy.get_screen("main_menu") != None: style_prefix "title_notify" elif renpy.get_screen("nvl") == None: style_prefix "notify" else: style_prefix "nvl_notify"
例2
if renpy.get_screen("splash") != None: null height 40 else: null height 50
例3
textbutton _("Flowchart") action [SelectedIf(renpy.get_screen("flowchart")),NullAction()]