Informative Tooltips

Using tooltips, you can make your chart information-rich yet keeping it clutter-free. Just delegate all the explanation for a particular data set to the tooltip and the user can hover over it to read the details. For example, if you had to explain why the revenue went up or down suddenly in a monthly revenue chart, the tooltip is of great help. In case you have a lot of details, you can have the tooltip in multiple lines too.

Hover over the columns for September, October or December in the chart below to see more details on them: