You can create a preview image before using Content Builder to create the parametric part, or Content Builder can generate the image once you have finalized the model.
The preview image is helpful in identifying the part during part selection. When using Content Builder to generate a preview image, a bitmap (BMP) image is created based on a specified view direction. You can select from the 10 standard AutoCAD® orthographic and isometric view directions to view the model (top, bottom, left, right, front, back, SW isometric, SE isometric, NE isometric, and NW isometric). The preview image is saved with the part when you save the part to the catalog.