"Zoom" or resize of a chart

Hello guys,
 
when trying to display a bar chart with loooots of bars, the screen space is not enough. However, this wouldnt matter too much If I could at least save the image with a much higher resolution AND more details in it.
 
So far I managed to save the image with a bigger size via:

                chart1.Dock = DockStyle.None; //turn docking off
                chart1.Width = chart1.Width * 3;
                chart1.Height = chart1.Height * 3;
                chart1.ChartAreas[0].Position.Height = 100;
                chart1.ChartAreas[0].Position.Width = 100;
                chart1.SaveImage(saveFile.FileName, ChartImageFormat.Jpeg);
                chart1.Dock = DockStyle.Fill; //turn docking on again

 
PROBLEM: While the size increases (OK), the amount of detail (e.g. number of labels, etc.) does not. Also the labelfont size is waaay too small this way :(