Our 3D CAD supplier models have been moved to 3Dfindit.com, the new visual search engine for 3D CAD, CAE & BIM models.
You can log in there with your existing account of this site.
The content remains free of charge.
In the docking window 3D History, you can jump to a specific construction step by moving the blue horizontal line. In other words, the 3D view shows the part in the respective construction phase.
If you are already at a certain step in the history, you only need to click on the command Set mark.
...and the line moves at this spot. You may add more construction steps there.