Any way to filter a large list of Sites in Active Directory Topology Diagrammer?

Hello,

We have about 150 sites in our AD implementation.  I'd like to use Active Directory Topology Diagrammer to just draw a subset, or filter, of all sites.  Can this be done?  If not, anyone know of another way to do this or another product/utility to do this?

Thanks for your help! SdeDot