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Clicking the 
button or inserting the Gliffy macro (described below) will create a new diagram. Each diagram has two links below it: 'Full Size' and 'Edit Diagram'. Clicking 'Edit Diagram' will bring up the Gliffy web-based editor where you can create and modify your diagram. When you're done, click 'Back to Confluence wiki page name'; your diagram will be saved and you'll be sent back to the original Confluence wiki page.
Diagrams that you create will be stored as an attachment to the original wiki page. Each time you save your diagram in the Gliffy Editor, a new version of your diagram will be created and attached to your wiki page. The diagram will retain the same name, so you'll have a complete version history of all changes. However, do not edit the attachment by hand or you will destroy the diagram and have to revert to a previous version.
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