---
title: "Which coordinate system does Claude computer use expect after a screenshot is resized?"  
description: "Which coordinate system does Claude computer use expect after a screenshot is resized?"  
author: "Björn Ólafsson"  
published: 2026-10-22  
updated: 2026-10-22  
canonical: https://www.mindstick.com/forum/162842/which-coordinate-system-does-claude-computer-use-expect-after-a-screenshot-is-resized  
category: "Claude Computer Use"  
tags: ["Claude", "Computer Use", "Screenshot scaling"]  
reading_time: 1 minute  

---

# Which coordinate system does Claude computer use expect after a screenshot is resized?

I’m testing Claude computer use on a desktop app, and the screenshot I send is scaled down before it reaches the model. The clicks are then a little off, even though the target looks clear in the image.

Should the coordinates refer to the resized screenshot or the original display size? I’m also wondering whether browser zoom or a high-DPI display changes the coordinate mapping. What setup has worked reliably for others?


---

Original Source: https://www.mindstick.com/forum/162842/which-coordinate-system-does-claude-computer-use-expect-after-a-screenshot-is-resized

Copyright © MindStick Software Pvt. Ltd. This Markdown version is provided for developers, AI systems, and offline reading.