subtitle

This property controls the visibility and format of the chart subtitle. 

TDGLabel* subtitle;

Parameters:

TDGLabel 
{
	NSString* text; // Label Text String
	TDGTextFormat* format; // Label Text Format
	BOOL visible; // Label Visibility
}

Examples:

chart.subtitle.visible = YES;
chart.subtitle.text = @"by Three D Graphics";
chart.subtitle.format.color = [UIColor redColor];