void test()
{
	// Declare active layer as a graph layer and check validity
	GraphLayer gly = Project.ActiveLayer();
	if( !gly ) return;
	
	// Point to the first data plot in layer and check validity
	DataPlot dp = gly.DataPlots( 0 );
	if( !dp ) return;
	
	// Get the format properties of the data plot into a tree
	Tree trFormat;
	trFormat = dp.Curve;
	// Dump the tree to script window to see what you have access to
	out_tree( trFormat );
	
	// You can then make changes to the tree and set it back to apply the changes
	trFormat.Symbol.Size.nVal = 12;
	dp.Curve = trFormat;
	
	// Or, once you know what is available by looking at the tree dump,
	// you can also set the properties directly without using the tree
	dp.Curve.Symbol.Shape.nVal = 3;
}