You can digitise a solid model, surface(s) or an STL model to represent the stock volume. It is recommended that the entities representing the stock are placed on a separate layer for easy selection and show/hide
Digitised Input: You will be prompted to digitise surfaces, solid or STL entities that represent the stock volume.
Usage: A stock model is available which represents a casting, forging or pre-machined material that is not a simple offset of the finished part.

Note that digitised Stock/Fixtures (Geometry menu) can
only select solids. Therefore EdgeCAM Simulator cannot display surface
or STL stock.