Sections

You do not need to know how the model is organized to use the app. But one piece of vocabulary shows up often enough that it is worth a short page: the section.

What a section is

A section is a named group inside the model — think of it as a folder for related parts. A typical bookshelf might have sections like:

• Carcass — the outer box.
• Shelves — the horizontal panels.
• Plinth — the kicker at the bottom.

The agent uses sections to organize its work and to give itself a handle to refer back to. The viewport renders everything from every section together — there is no separate tree view in the UI — but section names show up regularly in chat replies.

Sections can also be transformed (rotated, offset). That is how doors swing and drawers slide: each one is its own section that moves as a unit when you drag the relevant parameter.

Why this matters for you

When you want to refine a specific part of the model, name it the way the agent named it. The agent's chat replies usually mention the relevant section ("I'll widen the Carcass by 10 cm"). Mirroring that name in your prompt gives the agent an exact handle:

Make the Carcass 10 cm wider. Add a back panel to the Carcass. Move the bottom drawer down by 5 cm.

You can also refer to parts by their human description — "the left door," "the top shelf" — and the agent will resolve what you mean. Using the section name is just a shade more reliable when there are several candidates that match a description.

Next: Coordinate system — the last piece of vocabulary, then onto using the app.