hi,I have some question to ask.First,I use flash black and white checkboard as stimulate,blocked design which presents off(30second)-on(30s)-off(30s)-on(30s)-off(30s)-on(30s) pattern,so such stimulation lasts 3 minutes,TR=3s.In order to create the sem_assoc_s001_r100.dat file,I write the optseq command as bellow:optseq -ntp 60 -npercond 3 -tpercond 30 -o sem_assoc-s,I don't why whether is right or not? Besides that another command shows bellow:mkanalysis-sess -analysis sem_assoc -TR 3 -paradigm sem_assoc.par -designtype blocked -funcstem fmc -inorm -fwhm 4 -nconditions 1 -timewindow 30 -tprestim 31,I also do't know whether right or not? Second,the surf-sess command produce the surface,But the active area is very tiny,compare to the SUMA.the picture is in the attachment. how to adjust its colour and size? Thank you very much!!!