[Mne_analysis] plot_alignment what is what?

[Maximilien Chaumon]

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Hi all,

I'm aligning data from an old CTF dataset and was wondering what the blue
disks, and the blue surface are on the image below.
I can imagine that the disks are the sensors locations, and I'd expect the
blue surface to be the inside of the helmet, but it appears that the
sensors are located closer to the head than the helmet. What is it?

[image: pasted1]
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