When in doubt, read the giant wall of text that stands as documentation for the CLI-tool ^^. Here, specifically
this section.
(I keep forgetting to add a real
--help flag, mainly because the short
-h is already taken for invert for... non-obvious reasons unless you've ever used eips on Kindle ;p. But it's currently displayed when no arguments are specified).
Or, the slightly less daunting and much better organized wall of text inlined in the
API doc.