You can manipulate charts in your presentation to make them look just the way you want.
Drag the chart to where you want it on the slide.
As you drag, yellow alignment guides help you position the chart in relation to other objects on the slide (if you haven’t turned the alignment guides off in Keynote preferences).
Select the chart, then drag any of the selection handles (the white squares) on the chart’s border to make the chart larger or smaller.
To set a specific size for a chart, click the chart. In the Arrange pane of the Format inspector, type values in the Width and Height fields.
You can rotate a 3D chart to adjust its angle and orientation.
Select the 3D chart.
Drag the rotation control
on the chart to rotate the chart until it’s in the orientation you want.