Documentation Link

https://matplotlib.org/stable/api/_as_gen/matplotlib.figure.Figure.subplots_adjust.html#matplotlib.figure.Figure.subplots_adjust

Problem

The image implies "right" and "top" are given as distances from the nearest subplot, while in reality, they are supposed to be expressed as distances from the zero coordinate of the figure.

As an example, to center a figure one might give this according to the diagram:

fig.subplots_adjust(
  right = 0.2,
  left = 0.2,
  bottom = 0.2,
  top = 0.2
)

while the correct arguments would be:

fig.subplots_adjust(
  right = 0.8,
  left = 0.2,
  bottom = 0.2,
  top = 0.8
)

Suggested improvement

A simple correction of the diagram would likely be sufficient.