You should be able to do it like this: SPM.xCon(INDEX) = smp_FcUtil('Set', NAME, TYPE, 'c', CONTRAST, SPM.xX.xKXs); spm_contrasts(SPM); where: INDEX is the # of the contrast you want to change NAME is the name of the contrast TYPE is either "T" or "F" CONTRAST is the actual contrast vector ________________________________________ From: SPM (Statistical Parametric Mapping) [[log in to unmask]] on behalf of Kazuhiro Yamada [[log in to unmask]] Sent: Tuesday, December 04, 2012 10:41 AM To: [log in to unmask] Subject: [SPM] Contrast Manager Dear Colleague Please show me how to redefine already defined contrast on Contrast manager. I was once able to do this possibly right clicking mouse button on some open space in the Contrast manager. Unfortunately I have lost how to do it. Renaming contrast can be done by right clicking the mouse on the contrast. Thank you very much. Kazuhiro Yamada Physiology Oita Univ. Faculty of Medicine