Overlapped extent margin (in pixels).
// Java public int getOverlappedExtentMargin(); public void setOverlappedExtentMargin( int _value );
// Oxygene public property OverlappedExtentMargin : Integer read write;
Used to help render shapes placed at tiles' boundaries where rendered shape's elements must be placed also at neighboring tiles. Default value is 0.
For detailed discusssion see Tiled drawing.