...
The version dropdown in the top right corner of the macro editor allows you to switch between the last 20 versions of the macro. The A “Unsaved draft” version is automatically added whenever you change a version and allows you to always switch back to the last unsaved version of the diagram. Please note that this versions are managed “in parallel” to the versions of the Confluence page the macro is placed on. In other words, every version of the Confluence page stores all diagram versions that existed at the time the Confluence page was created.
...