Parts

A part's tabs:

Tab	What's in it
Overview	The picture and what ClassCAD measured: name in the model, bodies, volume, size, centre of gravity, number of expressions
Expressions	The model's expressions with their values
Files	Every file of the draft or version: kind, size, download. Files can be removed from a draft
History	Versions and revisions, as a timeline or a graph
Used by	The assemblies that use the part

Edit opens the draft in Buerligons. That's how a part is made and changed: a new part opens empty, and each save goes into the draft as its new source.

For a model made elsewhere, Upload (or Replace source) takes an OFB or STEP file into the draft. While its job runs, the Overview keeps showing the previous values with a note, and they change once the job is done. If ClassCAD can't read the file, the job line says why. Upload a good file and it runs again.

A part made by a generator shows where it came from: the generator, its version and the parameters. You get Run again in place of Edit, and Copy to take it over as a normal part.