Problem

From #18707 (comment):

Using lower-case "axes" in docstrings such as

Return whether any artists have been added to the axes.

is slightly ambiguous due to Axes being a special concept in Matplotlib not matching the plain english meaning.

Suggested Improvement

Always use "Axes" when referring to an Axes but not wanting to link to the class, .i.e.

Return whether any artists have been added to the Axes.

Note: This is a different compared to "figure".

Cases that should not become uppercase, include in particular

• "axes" as a simple plural of axis
• compound words like "axes space", "axes coordinates"