· Reference attach the DGN file into another DGN file as a reference. Then in Reference use the clip command to clip the reference file.
· Double click WMS image name in Raster Manager. This will bring up an Element Information box
· Under Geometry > Geocoding change the column "Inherit GeoCS From Model" to Inherited
· NOTE: This will change the location of you WMS image in your DGN file
· Clip the WMS.
· Under Geometry > Geocoding change the column "Inherit GeoCS From Model" to Not Inherited