Products
A product is a geometrical model that is or can be dressed. Once dressed, a product is used in producing synthetic images for design purposes. Its general appearance is obtained by assigning a photorealistic material (wood, leather, gold, plastic, etc.), by inserting it into a complex lighting environment (photo studio, forest, industrial environment, desert, etc.), and by adding effects such as backgrounds, post-processing, and overlays.
Products are managed from the tab 
Products from the sidebar of Matter.
Product Library
For this library, organization by model is mandatory. Models are created in Shaper . The Create and Duplicate operations for models are not available in Matter.
Some product thumbnails may appear with an 
icon. This indicator means that the image shown in the thumbnail no longer corresponds to the current representation of the product. The thumbnail will be recalculated and the indicator will disappear the next time you finish editing the product. Thumbnail images are updated either at the time the file is saved, or as a background task in order to maintain the smoothness of movement needed for correct functioning of the Matter module.
Note
Patchwork 3D allows you to memorize 4 favorite cameras per product. If favorite camera 1 is defined, it is then used as the viewpoint for calculating the thumbnail. Otherwise, the thumbnail will be calculated when you close the last viewport or viewport tab in which the product was active, using the camera viewpoint from that viewport.