> For the complete documentation index, see [llms.txt](https://docs.imerit-prod.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.imerit-prod.io/annotation-tool/key-features/ground-and-ceiling-mover.md).

# Ground and Ceiling Mover

The Ground and Ceiling Mover is a two way slider on the bottom right of the point cloud that allows users to hide points from ceiling to ground and vice-versa while labelling an object.

{% hint style="success" %} <img src="/files/qchq9tcQpS8cX7YBw03I" alt="" data-size="line"> Ground and Ceiling sliders help filter out points which the user does not need to view.
{% endhint %}

<div align="center"><figure><img src="https://lh7-us.googleusercontent.com/docsz/AD_4nXcPVR_jtYp63PVp-3TuqlUSYrrAT8SBXYV4NyaICgZTnMa4Zcbc1nfzsWCayh1DPfClAOj_LYc98bWzqwj-epEmPaOUkzUhPTi8DNxOewptg-Ns3XzHTVZoNWI4YuYnlaq_Ka2EG9Dwh5bASYhm01Y7bmk?key=lGhAQLv5xC3Ciuwf6zBTGQ" alt="" width="563"><figcaption></figcaption></figure></div>

## Benefits

* **Enhanced Focus:** Allows annotators to concentrate on a specific area of interest, eliminating distractions from irrelevant regions.
* **Increased Annotation Accuracy:** Provides a clearer view of smaller, detailed areas, aiding precise annotation.

## Steps to use Ground and Ceiling Slider

1. On hiding unnecessary points, users can accurately mark the points belonging to the object. For example Car parked under a Tree can be marked easily from the top view by sliding the marker from the ceiling lower, to hide points belonging to the tree top.
2. Shortcut to change Levels:
   * Ground Level (increase/ decrease) : `G + Up/ Down Arrow`
   * Ceiling Level (increase/ decrease) : `C + Up/ Down Arrow`