These steps improve situation: 1. UniChart.LayoutConfig.BodyPadding := 0; (from 10) 2. For UniPieSeries.SeriesLabel.Display='inside' i recommend using: config.innerPadding=10; config.insetPadding=-10; 3. For UniPieSeries.SeriesLabel.Display='outer' and 'rotate' i recommend using: config.innerPadding=10; config.insetPadding=30; // or more (depending on labels length) 4. And finally we need a way to reduce calloutLine.length somehow to minimize unused space around diagram.