[Mne_analysis] mne_analyze - only magnetometers?

[Eliezer Kanal]

Hello folks -

When computing the MNE (or dSPM, or sLORETA) with mne_analyze, is  
there a way to specify to only use a subset of the sensors?

On a similar note, when I load my data, the topographical data display  
only shows the gradiometers. Does this mean its only using the  
gradiometers to calculate the field maps? Is there a way to get it to  
show the magnetometers? Thanks in advance for your help -

Eliezer Kanal