refer to: https://matplotlib.org/stable/gallery/subplots_axes_and_figures/subplots_adjust.html#sphx-glr-gallery-subplots-axes-and-figures-subplots-adjust-py

Adjusting the spacing of margins and subplots using pyplot.subplots_adjust.

Note

There is also a tool window to adjust the margins and spacings of displayed figures interactively. It can be opened via the toolbar or by callingpyplot.subplot_tool.

import matplotlib.pyplot as pltimport numpy as np# Fixing random state for reproducibilitynp.random.seed(19680801)plt.subplot(211)plt.imshow(np.random.random((100, 100)))plt.subplot(212)plt.imshow(np.random.random((100, 100)))plt.subplots_adjust(bottom=0.1, right=0.8, top=0.9)cax = plt.axes([0.85, 0.1, 0.075, 0.8])plt.colorbar(cax=cax)plt.show()

Download Python source code: subplots_adjust.py

Download Jupyter notebook: subplots_adjust.ipynb