Simple Panel

import matplotlib.pyplot as plt

from mpl_visual_context.axes_panel import PanelMaker

fig, axs = plt.subplots(1, 2, num=1, clear=True)

ax = axs[0]
title_panel = PanelMaker(ax).add_panel("top", "empty", pad=0.0)

title_panel.anchor("SESSION 12", loc="lower left", size=15, borderpad=0.5)
title_panel.anchor(r"$\sigma=2.3$", loc="lower right")

ax = axs[1]
title_panel = PanelMaker(ax, mode="divider").add_panel(
    "top", "empty", pad=0.0, axes_kwargs=dict(fc="k")
)

title_panel.anchor("SESSION 12", loc="lower left", color="w", size=15, borderpad=0.5)
title_panel.anchor(r"$\sigma=2.3$", color="w", loc="lower right")


plt.show()