Oh, yeah, seems the peak finder doesn’t work with HEOG signals anyway, so you cannot use the HEOG channel here.
eog_projs, eog_events = mne.preprocessing.compute_proj_eog(
filt_raw, n_grad=0, n_mag=0, n_eeg=1,
)
filt_raw.add_proj(eog_projs)
filt_raw.plot(events=eog_events)
