Problem: Some Grid or Image theme legends will not look the same when imported from ArcView GIS into ArcMap
The legends for some image themes or grid themes (ArcView Spatial Analyst) will look slightly different in ArcMap.
In some cases the legend options in ArcView do not exist in ArcMap. ArcMap will assign a default legend to that raster such that it will appear just like it would if you had added it using the Add Data button in ArcMap.
Solution or Workaround
There is no work-around.