This enumeration selected indicates available styles to visually identify and manipulate selected marks.

Values:

IG_ARTX_SELECTION_RECTANGLE	Draws an outline of the bounding rectangle. This style is used for simple shape marks such as rectangle, ellipse, and text.
IG_ARTX_SELECTION_POINTS	Draws a square grip over each point. This style is used for marks expressed with a sequence of points such as polyline, freeline, and polygon. Each point is selected separately and can be moved independently.