Variable GraphicDeviceOpenConst

GraphicDeviceOpen: readonly [
    "pdf",
    "jpeg",
    "png",
    "windows",
    "postscript",
    "xfig",
    "bitmap",
    "pictex",
    "cairo_pdf",
    "svg",
    "bmp",
    "tiff",
    "X11",
    "quartz",
    "image_graph",
    "image_draw",
    "dev.new",
    "trellis.device",
    "raster_pdf",
    "agg_png",
    "agg_jpeg",
    "agg_tiff",
    "agg_ppm",
    "agg_webp",
    "agg_capture",
] = ...