Frequently asked questions - Writer
How do I draw a contiguous legend?
The Drawing toolbar contains a toolbar named Callouts, next to the Flowcharts icon. In this toolbar, the tools Line Callout1, Line Callout2 and Line Callout3 allow you to draw legends with connectors of various shapes, but the connectors are not joined on to the text boxes.
To have the frame of the legend joined to the connector, use the alternative Callouts tool in the first section of the bar (Basic Shapes), next to the Text icon. The FAQ for the Draw module How do I draw a contiguous legend? contains more explanations on how to use this tool..