Generating Thumbnails To generate thumbnails during Save to PLM operation, perform the following steps: In AutoCAD application, select PLM > Preferences; the Integration Properties for Integration dialog box is displayed. Select the Generate thumbnails during save to PLM check box located under the Thumbnails category. Click OK. Click Save to PLM on the toolbar. Note: Thumbnails are generated only for the editable components, that is, components with status draft, and that are locked by you (current user). To generate thumbnails for editable/non-editable files, perform the following steps: Open the AutoCAD file. Click Generate Thumbnails on the toolbar.