> For the complete documentation index, see [llms.txt](https://docs.studio.cogram.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.studio.cogram.com/designing.md).

# Designing with Chat

You design by talking. The clearer you are, the better the results.

## Give dimensions

The agent works in millimeters internally. Say "6m by 4m" or "200mm thick" — not "a big room" or "thin walls."

Metric is most reliable. Feet and inches work too.

## Reference objects by name

Click an object in the viewport to select it — its name appears in the chat input. Or refer to it naturally: "the south wall," "the second column," "the door."

## Build iteratively

Start simple. Add detail in follow-ups. The agent remembers the full conversation.

> Build a rectangular room, 5m by 4m, 2.7m ceiling height.

Then:

> Add a door on the north wall, centered.

Then:

> Add two windows on the east wall, evenly spaced.

Don't try to describe an entire building in one message. Break it into phases — the agent works best when each step is verifiable before moving to the next.

## Ask questions

The agent can measure and inspect your model:

* "How tall is the south wall?"
* "What's the total floor area?"
* "How far apart are the two columns?"
* "Are there any clashes between objects?"

## Make changes

Describe what you want changed:

* "Move the door 500mm to the left."
* "Make all walls 250mm thick."
* "Delete the roof."
* "Rotate the building 45 degrees."

If a change goes wrong, say "undo" or press Cmd+Z.

## Tips for complex designs

* **Use Plan mode first** for ambitious projects. Discuss the design, agree on dimensions, then switch to Build mode.
* **Let the agent verify** — it will take screenshots and check dimensions after each step. Don't rush past this.
* **Be explicit about spatial relationships** — "the slab should sit flush on top of the walls" is better than "add a slab."
* **Name things** — "call this wall North\_Wall" helps both you and the agent keep track.

## Example prompts

**Simple structure:**

> Design a single-room office: 5m by 4m, 2.7m ceiling, one door on the north wall, two windows on the east wall.

**Multi-storey:**

> Create a two-storey house. Each floor is 8m by 6m with 3m ceilings. Add a staircase connecting them.

**Sculptural:**

> Create a vase — 300mm tall, round base 80mm diameter, narrow neck 40mm, flared rim 60mm. Use a BSpline revolution.

**Working with an import:**

> I've uploaded an IFC file. Add a new column at position (3000, 5000).

**Analysis:**

> List all the walls and their dimensions.


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# Agent Instructions
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