I have images from GSECARS. I am trying to improve the background reduction by fitting the spectrum and getting new ROIs.

I did a fit but I don’t manage to update the ROI’s. I tried saving to a .mca file and uploading again  but I don’ t see a change.

Since I come from other software I may have pre-concepts,  maybe the first question is:

can a new fit be done and get new (maybe cleaner) images? 

or 

Can I only work with the ROI’s from the experiment?

If it can be done, how should I proceed after doing the fit to update ROI’s?

I have emailed this question to Matt also (before finding this mailing list).

Thanks in advance,

Best regards,

Ana