The changes affect only the selected element or data series. To change another series, click one of its elements, then make changes.
To select multiple series, click a series element, then sidebar, click the Chart tab.
Click the disclosure arrow next to Gaps, then set the amount of space.
Click the disclosure arrow next to Rounded Corners, then drag the slider or type a specific value.
To round only the two outside corners of each bar or column (those farthest from the axis), select the Outside Corners Only checkbox.
You can change the chart depth, lighting style, bar shape, bevels, and rotation of 3D charts.
Click the chart, then in the Format sidebar, click the Chart tab.
Below Radar Chart, do any of the following:
Change the grid shape: Use the options next to Grid Shape to choose whether you want the grid to be straight or curved.
Change the fill and stroke: Use the options next to Style to choose whether you want all series to have a color fill, a stroke along the edge, or both.
You can Modify chart data in Pages on MacUse chart styles in Pages on Mac