What is the bar graph on the top of documentation pages?
The bar graph represents different versions of the project or documentation you are currently browsing. The plus and minus signs above and below the version numbers indicate that the documentation has changed. The red and green bars represent the difference; the higher the bar, the more change there has been compared to the previous version. Versions where the documentation doesn’t exist are grayed out. You can navigate between versions by clicking the appropriate version number.
