Hi, I'd like to create a new topology, but when I click on the feature data set, then new, topology is greyed out (as anything else, except feature class). Does anybody know how to fix that? Thanks for your help!
Or you can go to Help > About ArcMap. This should also list the license type.
If you are using ArcView you will not have the ability to create a geodatabase topology. There are 3 license levels for ArcGIS Desktop: ArcView, ArcEditor, and ArcInfo. You will need at least an ArcEditor license to create a geodatabase topology.