Install the package
Once you have the package installed,
you have to configure it on your Sphinx documentation.
To do this, add this extension to your Sphinx’s extensions in the
# conf.py extensions = [ # ... other extensions here 'versionwarning.extension', ]
After installing the package and adding the extension in the
if you build the documentation of an old version on Read the Docs,
you will see a nice banner pointing to your latest release.
In case you want to show a customized banner in a specific version, see Configuration setting.