.png"       border = { 0, 0, 0, 0 }       stretch = TRUE       orientation = VERTICAL     }      image {       function = ARROW       overlay_file = "assets/null.png"       overlay_border = { 0, 0, 0, 0 }       overlay_stretch = FALSE       arrow_direction = UP     }      image {       function = ARROW       overlay_file = "assets/null.png"       overlay_border = { 0, 0, 0, 0 }       overlay_stretch = FALSE       arrow_direction = DOWN     }      image {       function = ARROW       overlay_file = "assets/null.png"       overlay_border = { 0, 0, 0, 0 }       overlay_stretch = FALSE       arrow_direction = LEFT     }      image {       function = ARROW       overlay_file = "assets/null.png"       overlay_border = { 0, 0, 0, 0 }       overlay_stretch = FALSE       arrow_direction = RIGHT     }      # 