See User Representations for details about the use of User Representations.
The following can be defined as stock, design or fixtures in the Part Operation editor:
Video results can be used effectively in a Part Operation that contains more that one program. The Video result of the last operation of a program can be used as the stock for a following program. For that, you must set the Simulation at Part Operation level option and use the Video from Last Saved Result command when using simulation in the following program.
If there is no stock defined, the envelope volume of the design part is used. If there is no design part, the envelope volume of the design part is used.
In Video mode only, if the stock geometry is not correctly closed, a stock representing the envelope volume of the stock is computed.