Drawing a Venn diagram with Gliffy takes just minutes. Venn diagrams show logical relationships between things that share elements in common. They use overlapping circles or ellipses to capture overlapping elements.
Use the Text tool (see Adding text boxes) to insert text in the areas where your circles intersect.
To help you create them, when you create a new diagram, you can choose from several Venn diagram templates.
And, Venn diagram shape libraries offer several colorful circles to make your diagram look great.