> For the complete documentation index, see [llms.txt](https://docs.tachyon.video/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tachyon.video/user-guide/2.-setting-up-a-show/3d-scene/calibration-lock.md).
# Calibration Lock
Once a Calibration is complete, it is possible to lock it in order to avoid unintended modifications.
{% hint style="danger" %}
Accidently clicking in the Calibration Tools Window Preview could void a perfect Calibration if it isn’t locked.
{% endhint %}
## Locking Calibration
1. Press **`2`** on the keyboard or click on the **`Calibration`** toggle to select the 3D Scene module’s Calibration mode.
2. Click the Calibration Lock button located in the top-right corner of the Calibration Tool window or Access the Settings Panel by clicking on the Settings button.
3. Click on the **`Controls Locked`** toggle to lock all Calibrations.
{% hint style="info" %}
**`Controls Locked`** will lock Calibration for all Displays. Following this, it will be impossible to add new Calibration Points, manually move Displays (for both position and orientation) or attempt Auto-Calibration.
Locking the calibration will also lock the quick option bar in the Calibration Tools
{% endhint %}
