mne.viz.topomap sensor name size too small

Names on the topomap are always printed small: https://github.com/mne-tools/mne-python/blob/master/mne/viz/topomap.py#L604 ax.text(p[0], p[1], ch_id, horizontalalignment='center', verticalalignment='center', size='x-small')

That’s too small if you choose a size of several inches (e.g. 10).

Possible solutions:

• Provide another API parameter
• Derive the parameter from the ‘size’ parameter

[dengemann]

Another solution, just edit the figure post-hoc:

for tt in plt.findobj(fig, matplotlib.text.Text):
    if tt.get_text() in evoked.ch_names:
        tt.set_fontsize(14)

[agramfort]

I upvote @dengemann 's answer. It should do the job.