[WIP] brainstorm signal plots

The alternative is to specify the selection by creating a custom montage. In the figure control panel (main brainstorm window), select "NIRS Overlay > Edit Montages ..."

{{attachment:NIRSTORM_tut_nirs_tapping_edit_custom_montage_menu.png||height="150"}}

Then create a new custom montage with required channels, eg S1D1 et S2D1:

{{attachment:NIRSTORM_tut_nirs_tapping_edit_custom_montage_edit.png||height="200"}}

On the right panel, each line defines how to represent a given channel:

<label_name> | : <channel_name>