# 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 labeling an object.

{% hint style="success" %} <img src="https://3895963154-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTcOUG6rfWxqGM0N4db2P%2Fuploads%2FGOAkLkFFY9H0DEt10649%2Fbold_idea_icon.png?alt=media&#x26;token=5e795075-b5f4-4e03-a9dd-c01069ceac8b" alt="" data-size="line"> Ground and Ceiling sliders help filter out points which the user does not need to view.
{% endhint %}

<figure><img src="https://3895963154-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTcOUG6rfWxqGM0N4db2P%2Fuploads%2FsTQcRIF8g65incbte5Fk%2FGround%20Ceiling%20Slider.gif?alt=media&#x26;token=d8370f4b-7276-4be9-995c-08b24ad4e395" alt=""><figcaption></figcaption></figure>

## 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.

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## Steps to use Ground and Ceiling Slider

{% stepper %}
{% step %}

### Use case: hide unnecessary points

On hiding unnecessary points, users can more accurately mark the points belonging to the object. For example, a 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.
{% endstep %}

{% step %}

### Shortcuts to change levels

* Ground Level (increase/decrease): `G + Up/Down Arrow`
* Ceiling Level (increase/decrease): `C + Up/Down Arrow`
  {% endstep %}
  {% endstepper %}