Start Angle
The angle in degrees where the arc begins. An arc is drawn anti-clockwise.
End Angle
The angle in degrees where the arc ends. An arc is drawn anti-clockwise.
Radius X
Stretches or shrinks the arc across the X axis. Value is in pixels.
Radius Y
Stretches or shrinks the arc across the Y axis. Value is in pixels.
Rotation Angle
The amount in degrees by which the arc is rotated about the X axis. Normally only works when Radius X and Radius Y have different values.
Small Arc
When enabled the arc is drawn via the smallest angle, i.e. draws the opposite arc.