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

# Use references

> Identify authoritative files, pages and markup for a task.

A reference explains what to work from. A connected model identifies where work happens. State both.

<h2 id="choose-the-source">
  1\. Choose the source
</h2>

Name the file, revision, page and relevant detail. Supply dimensions and units where accuracy matters. Explain which source wins if a drawing, specification and existing model disagree; ask for clarification when information is missing.

<h2 id="confirm-it-is-available">
  2\. Confirm it is available
</h2>

Choose **Attach file**, then open an image attachment to check its preview. Ask Ideatura to identify the source and relevant content it can read; previewing a file does not establish that every page is in context. See [Files and outputs](/apps/files) and [Viewers and markup](/studio-reference/ui-panels).

<img src="https://mintcdn.com/ideatura/es2pEmCgfCrT5MoG/images/studio-tour/reference-preview.svg?fit=max&auto=format&n=es2pEmCgfCrT5MoG&q=85&s=223191d027b49a5bda54742247405751" className="w-full h-auto mx-auto" alt="Image attachment preview: 1 reference; 2 close preview. Check that the reference matches your request." width="1449" height="1001" data-path="images/studio-tour/reference-preview.svg" />

<h2 id="send-the-markup">
  3\. Send the markup
</h2>

Capture the relevant view, mark the change and confirm the reference is attached before sending the request. Drawing a mark does not itself execute the change. Follow [Draw over Revit](/draw/markup/draw-over-revit-to-explain-a-change) or [Read a drawing](/draw/markup/understand-a-drawing-before-acting).

<h2 id="inspect-against-the-source">
  4\. Inspect against the source
</h2>

Compare the result with the authoritative dimensions and geometry. Record inferred or unresolved details. A screenshot is useful for intent, but it may not supply the precise reference needed for native geometry.


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