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Using a Cell Tag to Select a Thumbnail

You can select any code cell (with appropriate output) by tagging it with the nbsphinx-thumbnail tag.

If there are multiple outputs in the selected cell, the last one is used. See Choosing from Multiple Outputs for how to select a specific output. If you want to show a tooltip, have a look at Using Cell Metadata to Select a Thumbnail.

import matplotlib.pyplot as plt

/home/docs/checkouts/readthedocs.org/user_builds/nbsphinx/envs/0.8.2/lib/python3.7/site-packages/traitlets/traitlets.py:3036: FutureWarning: --rc={'figure.dpi': 96} for dict-traits is deprecated in traitlets 5.0. You can pass --rc <key=value> ... multiple times to add items to a dict.
  FutureWarning,

The following cell has the nbsphinx-thumbnail tag:

fig, ax = plt.subplots(figsize=[6, 3])
ax.plot([4, 9, 7, 20, 6, 33, 13, 23, 16, 62, 8])

[<matplotlib.lines.Line2D at 0x7fa5e3893310>]