masking a polygon to mask everything outside the polygon hidden...!

Discussion created by bvs@student on Dec 13, 2012
Latest reply on Dec 13, 2012 by dkwiens
I am a student.  I am trying to create a mask of a county, so that it will mask all other features including rasters, points and polygons that are not within the internal boundary area of the county.  I have tried most of the masking tools and what ends ups happening is that the masked polygon hides the area within and not the outside area.  I can get the extraction masking tool to work but when I    do this tool it does not mask the other polygons, lines and points.