This window lets you join Parts.
This method of joining Parts works well no matter how many Parts you have in your model.
If you only have a few Parts, you may prefer to use a Matrix to choose the Parts you want to join.
Lists all the Parts in your model. Select one or more Parts in this list.
Also lists all the Parts in your model. Select one or more Parts in this list.
Click this button to join all Parts selected in the top window with all Parts selected in the lower window.
You can apply the above procedure as many times as you wish without exiting this window. Every time you click Apply, the specified Parts are joined.