---
title: "How do I stop visual monitoring flagging ads or rotating…"
description: "Draw ignore-zone rectangles on the screenshot so Lemwatch masks noisy regions (ads, timestamps, carousels) before comparing pixels."
canonical: "https://lemwatch.com/help/visual-monitoring-ignore-zones"
source: "https://lemwatch.com"
---

# How do I stop visual monitoring flagging ads or rotating banners?

> Draw ignore-zone rectangles on the screenshot so Lemwatch masks noisy regions (ads, timestamps, carousels) before comparing pixels.

## Quick answer

 Open the monitored page, click **Ignore Zones**, and draw rectangles over noisy regions. Lemwatch masks those pixels black in both baseline and current screenshots before running the diff.

## Common ignore targets

- Ad slots

- Live chat widgets

- Timestamps and "as of" dates

- Rotating hero carousels

- Cookie banners

- Weather / stock ticker widgets

## Where to find it in Lemwatch

 **Site → Visual Monitoring → <page> → Ignore Zones**.

## FAQ

### Do ignore zones survive layout shifts?

 Zones are pinned to CSS coordinates. Big layout changes may require redrawing.

## Related

- CSS selectors

- Diff threshold


## Related

- [Help centre](https://lemwatch.com/help)
- [How do CSS selectors work in visual monitoring?](https://lemwatch.com/help/visual-monitoring-selectors)
- [What is the visual monitoring diff threshold?](https://lemwatch.com/help/visual-monitoring-diff-threshold)
- [How do I monitor a JSON API endpoint?](https://lemwatch.com/help/monitor-json-api-endpoint)
- [Lemwatch pricing](https://lemwatch.com/pricing)