Parametric procedures can be previewed in the project
Published on
Sawdust parametric procedures preview their parts in your project, with live-updates when you edit parameters.
The Procedures library displays a parameter form and an in-scene preview before a procedure is committed. The preview places the generated parts where they will appear in the project.
This lets you inspect the size and position of an assembly such as a sawhorse or frame before adding its operations. Adjust the parameters and review the preview before committing the result.

For instructions, see How to preview a parametric assembly before adding it.