> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cosmon.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Drawing Creation (3D to 2D)

> Get a drawing most of the way there — views, initial dimensions, notes, and tolerance assistance, directly inside your CAD modeler.

## Overview

Nexus gets a drawing most of the way there: it picks views, places initial dimensions on the view that reveals them, adds notes, and helps apply tolerances and GD\&T. You describe the intent and the standard; Nexus drafts to it, following ASME Y14.5, ISO 128/8015, or your own house rules.

<Note>Treat Nexus as a drafting assistant, not a replacement for a final check. It gets you to a strong first pass — views, dimensioning scheme, tolerances, notes — but a full production-grade, release-ready drawing still needs a pass from an engineer. Run [Drawing Review](/cad/drawing-review) and a human check before it goes out.</Note>

**Always select the Drawing agent** — then describe the goal, attach context, and send.

Capabilities: Part & Assembly Drawings · Multi-view · Section & Detail · BOM & Balloons · GD\&T

## Doing the same drawing over and over? Train a workflow

If you generate the same style of drawing repeatedly — same template, same view scheme, same tolerancing rules, just a new part each time — this is the best way to do it. A [Workflow](/getting-started/workflows) turns that entire drawing procedure into a button: train it once on a real part, then create every drawing after that with a click instead of a prompt.

<Steps>
  <Step title="Build it on one part">
    Produce a drawing exactly the way you want it — your template, your views, your dimensioning scheme — in a workflow chat.

    ```text theme={null}
    "Using our A3 template, generate Front + Right view, third-angle, fully dimensioned from DimXpert data, title block filled from the model's custom properties."
    ```
  </Step>

  <Step title="Test run to validate">
    Run it once for real on a representative part. Once it passes, Nexus saves it as a validated workflow.
  </Step>

  <Step title="Run it for every new part">
    For the next part, open the workflow, swap in the new file, and hit **Run**. Same template, same views, same rules — no re-prompting.
  </Step>
</Steps>

See [Workflows](/getting-started/workflows) for the full guide to building, validating, and running one.

## Two ways to work

You can steer every step or hand Nexus the goal and let it run — either way produces the same drawing.

<CardGroup cols={2}>
  <Card title="Step by step — fast & precise" icon="list-ol">
    You make the calls. Each step runs straight through and lands exactly what you asked for.

    ```text theme={null}
    "Front + right view on A3 + dimensions."
    ```
  </Card>

  <Card title="Hands-off — least effort" icon="wand-magic-sparkles">
    Describe the goal and Nexus picks the views, scheme, and layout for you.

    ```text theme={null}
    "Make a fully dimensioned A3 drawing."
    ```
  </Card>
</CardGroup>

**What steering looks like — one prompt at a time:**

```text theme={null}
1  "Front + Right view on A3, third-angle."
2  "Add Section A-A through the front view."
3  "Dimension it — ordinate from the bottom-left corner."
4  "Add GD&T: position on the 4 bolt holes to datums A|B|C."
```

Each step is small and you can check it before the next. Prefer hands-off? The same drawing from one prompt: *"A3 third-angle, fully dimensioned, with a section through the bore."*

## Three built-in workflows

Nexus ships with three predefined drawing workflows. Launch them from the buttons at the top of the chat. Treat them as starting points — open any workflow and edit the steps to match your standards: your template, your planning rules, your review checklist.

<AccordionGroup>
  <Accordion icon="pen-ruler" title="Drawing Plan — plan before you draw">
    Decides *how* to draw the part first — manufacturing method, primary view, the view set, dimensioning scheme, sheet, scale, and GD\&T. You approve or adjust, then it executes.

    Edit it to encode your planning standards.
  </Accordion>

  <Accordion icon="file-lines" title="Drawing Recipe — make a standard drawing">
    Produces a standard drawing end to end, the way your shop always does it.

    Edit it to point at your template and house conventions.
  </Accordion>

  <Accordion icon="magnifying-glass" title="Drawing Review — check the result">
    A manufacturing and standards review — checks the drawing feature by feature against ASME/ISO and your house rules: missing or wrong-view dimensions, blank title-block fields, missing tolerances, overlaps.

    Edit it to match your review standards. See [Drawing Review](/cad/drawing-review) for the full workflow and example prompts.
  </Accordion>
</AccordionGroup>

## Example prompts

<AccordionGroup>
  <Accordion icon="file-lines" title="Generate a drawing from scratch">
    ```text theme={null}
    Front + Top + Right, third-angle, A3 landscape.
    ```

    ```text theme={null}
    A3 third-angle. Front + Right, then Section A-A through the bore. Dimension ordinate from the bottom-left, hole callouts on the circular view. GD&T: position on the bolt holes to A|B|C. Title block material 6061-T6.
    ```
  </Accordion>

  <Accordion icon="scissors" title="Add a section or detail view">
    ```text theme={null}
    Section A-A through the bore, aligned vertical.
    ```

    ```text theme={null}
    Add a 2:1 detail view on the keyway.
    ```
  </Accordion>

  <Accordion icon="ruler" title="Dimension and tolerances">
    ```text theme={null}
    Dimension the front view — ordinate from the bottom-left corner.
    ```

    ```text theme={null}
    Hole callouts on the circular view, PCD reference circle.
    ```

    ```text theme={null}
    Turned part — dimension from the spindle face as datum A.
    ```
  </Accordion>

  <Accordion icon="drafting-compass" title="Add GD&T">
    ```text theme={null}
    Add GD&T: position on the 4 bolt holes to datums A|B|C.
    ```

    ```text theme={null}
    Add a flatness tolerance of 0.05mm to the bottom face.
    ```
  </Accordion>

  <Accordion icon="table" title="Title block and template">
    ```text theme={null}
    Title block: material 6061-T6, finish anodized, drawn-by <name>.
    ```

    ```text theme={null}
    Use the template at C:\Templates\ISO_A3.drwdot.
    ```
  </Accordion>

  <Accordion icon="table" title="Generate a BOM">
    ```text theme={null}
    Generate a BOM from the active assembly. Include columns for Item, Part Number, Description, Material, Quantity, and Mass (kg). Format it for inclusion on the assembly drawing sheet.
    ```
  </Accordion>
</AccordionGroup>

## You're in control

### 1. Attach a template — anywhere

Drop your `.drwdot` into a workflow, attach it in the chat with the clip icon, or specify its path. Nexus uses it either way.

### 2. Select it, then say what to do

Select dimensions or views in your CAD modeler, tell Nexus you've selected them, and it edits, deletes, or updates just those.

```text theme={null}
"Change the tolerance on these to ±0.05."
"Make these bores H7."
"Move the Ø12 callout off the section line."
```

### 3. Stop it when it deviates

If Nexus heads the wrong way, hit stop and redirect — you're never locked into a run. Correct it in a sentence and carry on from where it was.

### 4. Teach it once, reuse it forever

Run a task — say, applying your tolerance standard. Once it's right, tell Nexus to save those steps as a skill, then reuse it by name:

```text theme={null}
"Use apply-tolerances-mystandard on this part."
```

For a full drawing you regenerate for every new part — not just one sub-step — save it as a [Workflow](/getting-started/workflows) instead: same idea, but triggered with a Run button instead of a prompt. See [Doing the same drawing over and over?](#doing-the-same-drawing-over-and-over-train-a-workflow) above.

## Tips for drawing creation prompts

* **Specify the standard upfront** — ISO and ASME Y14.5 have different annotation conventions, projection methods, and tolerance interpretation rules. State which applies.
* **Be specific about views and layout** — name the views, sheet size, projection angle, and scale. The more you name, the more precisely Nexus lands it.
* **Name datums explicitly** — when applying GD\&T, specify datum letters and which faces they correspond to so references are consistent across features.
* **Describe what's already there** — if a drawing exists and you're adding to it, tell Nexus what views and dimensions are already present so it doesn't duplicate them.
* **Run Drawing Review before sending it out** — after generating, run [Drawing Review](/cad/drawing-review) to check for undimensioned features, blank title-block fields, and missing tolerances before sending for approval.
* **Plan for a final human check** — Nexus gets views, dimensions, notes, and tolerances most of the way there in one pass, but treat the output as a strong draft. Have an engineer review it before it's treated as production-grade and released.
* **Train a workflow for repeat jobs** — if you generate the same drawing style from a template over and over, validate it as a [Workflow](/getting-started/workflows) once, then run it for every new part instead of re-prompting.