Sets the layer at which the region's graphics are drawn relative to others in its frame
Signature:
LayeredRegion:SetDrawLayer("layer", sublayer)
Arguments:
layer- String identifying a graphics layer; one of the following values: (string, layer)ARTWORKBACKGROUNDBORDERHIGHLIGHTOVERLAY
sublayer- Sub-layer within thelayer; Defaults to zero, must be between -8 and 7 (errors otherwise) (number)