To make your reports easy to read you can add images or icons to the title. Visual communication is powerful and this will help you as a report editor to get attention and focus.
To add images or icons to the graph title you click on the three dotted line next to the graph title and then click on edit.
In edit mode you click on "Show more options" under "Title".
You will be presented with a new window where you drag and drop a image or icon you want to include in your graph. Customize the size by dragging in the circle and click "OK".
To make this image or icon avalible you have to click "Save chages".