Properties of the root graphics object:

beingdeleted: {"off"} | "on"
     beingdeleted is unused.

busyaction: "cancel" | {"queue"}
     busyaction is unused.

buttondownfcn: string | function handle, def. [](0x0)
     buttondownfcn is unused.

callbackobject (read-only): graphics handle, def. [](0x0)
     Graphics handle of the current object whose callback is executing.

children (read-only): vector of graphics handles, def. [](0x1)
     Graphics handles of the root's children.

clipping: "off" | {"on"}
     clipping is unused.

commandwindowsize (read-only): def. [0   0]

createfcn: string | function handle, def. [](0x0)
     createfcn is unused.

currentfigure: graphics handle, def. [](0x0)
     Graphics handle of the current figure.

deletefcn: string | function handle, def. [](0x0)
     deletefcn is unused.

fixedwidthfontname: string, def. "Courier"

handlevisibility: "callback" | "off" | {"on"}
     handlevisibility is unused.

hittest: "off" | {"on"}
     hittest is unused.

interruptible: "off" | {"on"}
     interruptible is unused.

monitorpositions (read-only):
     monitorpositions is unused.

parent: graphics handle, def. [](0x0)
     Root object has no parent graphics object.  parent is always empty.

pickableparts: "all" | "none" | {"visible"}
     pickableparts is unused.

pointerlocation: two-element vector, def. [0   0]
     pointerlocation is unused.

pointerwindow (read-only): graphics handle, def. 0
     pointerwindow is unused.

screendepth (read-only): double

screenpixelsperinch (read-only): double

screensize (read-only): four-element vector

selected: {"off"} | "on"
     selected is unused.

selectionhighlight: "off" | {"on"}
     selectionhighlight is unused.

showhiddenhandles: {"off"} | "on"
     If showhiddenhandles is "on", all graphics objects handles are visible in their parents' children list, regardless of the value of their handlevisibility property.

tag: string, def. ""
     A user-defined string to label the graphics object.

type (read-only): string
     Class name of the graphics object.  type is always "root"

uicontextmenu: graphics handle, def. [](0x0)
     uicontextmenu is unused.

units: "centimeters" | "characters" | "inches" | "normalized" | {"pixels"} | "points"

userdata: Any Octave data, def. [](0x0)
     User-defined data to associate with the graphics object.

visible: "off" | {"on"}
     visible is unused.