I'm pretty new to Vectorworks and having trouble using a DWG file from a surveyor. I can import it, but there are lists of layers that i can't hide and I'm trying to remove some so I can see the site correctly and I also want to create a site model from the survey as would like to use this to practice 3D modelling with this new garden. The only layers that seem to turn off are title blocks, north point and sheet borders. No levels, tree canopies, boundaries or anything within the survey switch off. Is it something I am doing wrong or has the surveyor locked the layers somehow? Is it possible for them to do that?