# Screens Alignment

The Screen Alignment Reposition Tool is used to reposition multiple screens based on a known calibrated tracked camera.

{% hint style="info" %}
For this tool to work, the tracked camera needs at least Pan/Tilt encoders, but ideally a full 6DoF tracking system will generate better calibration results.
{% endhint %}

### Prerequisites

* At least one [calibration screen](/grid/virtual-production/calibration-screens.md) or for a more complex wall in real life, can use a [multiscreen](/grid/virtual-production/calibration-screens/multiscreen.md) in Grid Studio.
* A camera object within Grid Studio
* A Lens Profile for the camera
* A [supported tracking system](/grid/virtual-production/supported-tracking-protocols.md)
* An Alignment Profile or the incoming tracking data is aligned properly already
* A map input within the camera object to allow the tracking system to be driving the camera in Grid Studio.
* Media Input into Grid Studio

### Workflow

1. Using a camera with a linked Lens Profile, and linked Alignment Profile and a tracking system mapped as a Map Input
2. Move the camera to a location within the tracking region, and rotate the camera so that the calibration screeen can been seen by the camera
3. capture an image as observation.
4. Repeat this process for different locations ideally pushing to the edges of the tracking region and the camera would reach maximum pan and tilt
5. Run the calibration


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