To import Visio stencils, first select the Symbols tab in the SmartPanel to the left of your drawing area. Next, click on the hamburger menu in the symbol library area and choose the "Import Visio Stencils."
Browse for any Visio stencil files on your desktop that you want to import. Select the file or files you want to import and click "Import Selected Files."
Once the import is complete, SmartDraw will automatically create libraries that match the imported file names and dock them next to your drawing.
You can now add your new symbols to your drawing.