Saved documents are retrieved in multi-threaded mode.
When you retrieve a large part, drawing, or assembly document, the document immediately displays in a view-only state while the actual document and all its components are retrieved in the background. During the view-only state, you can use all functions supported in the SOLIDWORKS Viewer (Zoom, Rotate, and so on), but you cannot switch to another document or start to open another document. After the retrieval is complete, SOLIDWORKS changes to the normal edit state.
Documents saved in releases prior to SOLIDWORKS 98 cannot be retrieved in multi-threaded mode.