When using preview in SWExplorer and an assembly is open there is a checkbox in the lower left corner of the preview window. It is normally checked and it says, simply, Use full screen. The tip is to uncheck this and then preview every subassembly and part in the feature tree. This will cause all the subassemblies and parts to be tiled on the preview window. Then just clicking on the item of interest will activate that small portion of the window for that part. This makes it much easier to see just what documents comprise an assembly. In addition the active tile responds to rotate and zoom commands just like the full screen version. A nice enhancement would be to enable bulk selection of items to tile in the preview window.