A decal is a 2D image applied to a model. You can use decals to apply warning or instruction labels to models. You can use decals to create model details that you can represent with an image instead of with the model geometry, such as a car grill or a picture frame.

You can view and apply decals in SOLIDWORKS.

Model of car
Model of car with decal applied to represent the grill
By default, decals use an illumination scheme that is distinct from the scheme for the appearance under the decal. To use the appearance illumination scheme, in the Decals PropertyManager, on the Illumination tab, select Use Underlying Appearance.