You can save time when editing charts by using multi-select and select all. For example, in the Format Chart task pane, you can format all chart values at once by holding Ctrl, clicking on all names (e.g. Grand Total, Bar Totals, etc) and selecting the number format. You can also expedite label formatting, such as making all labels in a Marimekko the same size. Simply right click anywhere in your chart, choose "Select All Labels", then right click on a single label and adjust the font size. If you're a quick key fan, use Ctrl A to select all labels and then right click on a single label to format all fonts. Wow, that's fast!