By default, the width of chart boxes adjusts to accommodate the widest text. You can specify a wider box width for selected positions.
To create extra-wide manager boxes:
1 In your chart, select the boxes you would like to widen.
2 Click the Format tab and select Layout from the Box Properties section.
3 Click the Box Sizing tab.
4 Deselect Auto Width by clicking Fixed Width and enter the appropriate width in the Width field.
5 Click OK. The selected boxes are widened to match to match the Width value you entered.