**fScan Reference Manual, Chapter 2 (CmdLineOptions:Expr): Roifill** ===== Roifill -- Fill ROI within data set with specified value ===== **usage: -expr roifill FILLVAL [ROINUM [NROIS]]** Fill region within selected Block ROI's. with FILLVAL If multiple Block ROI's are associated with the current data set, all will be filled by default. Or you can select just a subset of the active ROI's by specifying ROINUM (how many to skip) and/or NROIS (how many to use). **See Also:**\\ [[jvs:fscan:manual:chapter2:expression|Expression Command]], [[jvs:fscan:manual:chapter2:expression:roimask|Roimask]], [[jvs:fscan:manual:chapter2:expression:roimove|Roimove]] [[jvs:fscan|fScan Home]], [[jvs:fscan:manual|fScan Manual]], [[jvs:fscan:manual:chapter2|CmdLineOptions]], [[jvs:fscan:manual:help|Manual Help]]