I want to edit a Sphinx theme and can't understand what variables are present in the document. The official documentation lacks any kind of information.
How do I see what variables are present in the template?
I think this documentation page will help you - it describes what blocks, configuration variables, helper functions and global variables are available in the template.
And, by default sphinx uses jinja2 templating language - so you can print out the whole template context, like it was suggested in this thread (not sure it'll work in your case).
Hope that helps.