# Timeline Duration

The Timeline’s duration is determined by the Sequence’s duration. By **default, a Sequence has a duration of 2 hours**. 

{% hint style="info" %}
Every newly created Sequence will have this duration if the default value isn’t changed.
{% endhint %}

## Change the Default Value for Sequence Duration

1. Open the Settings module by pressing <kbd>**`Alt`**</kbd>**+**<kbd>**`S`**</kbd> or by selecting **{System > Settings}**.
2. Click on the **`General`** tab.
3. Select **`Timeline`** in the list.
4. **`Click`** on the Sequence time input box located underneath the Timeline window section to edit its default value.
5. **Enter the new default values** for Sequence duration using the keyboard. Values are expressed as follows: *hours:minutes:seconds:frames*.

![](https://2251001579-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2Ftachyon-documentation%2F-MZP2kdJn-pHuPGFzNLE%2F-MZP4pyukZ_thAG-hVE6%2F0.png?generation=1619640410721902\&alt=media)

## Change the Duration of a Sequence

1. **`Right-click`** on the Sequence tab to open a contextual menu.
2. Select **{Properties}** from the menu; a Sequence Properties window will open.

![](https://2251001579-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2Ftachyon-documentation%2F-MZP2kdJn-pHuPGFzNLE%2F-MZP4pyvwIf5xAVKdYNn%2F1.png?generation=1619640410756163\&alt=media)

3. **`Click`** on the Duration time slider to edit its default value.
4. **Enter the new default values** for Sequence duration using the keyboard. Values are expressed as follows: *hours:minutes:seconds:frames.*
5. Click on the **`OK`** button. The Timeline will be extended or reduced to match the Sequence’s duration.
6. A dialog box will open to tell you if some Clips are out of range now that the Sequence duration has been altered.&#x20;

{% hint style="info" %}
This is non-destructive; if the Timeline’s duration is returned to its original format the Clips will be reintegrated.
{% endhint %}

![](https://2251001579-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2Ftachyon-documentation%2F-MZP2kdJn-pHuPGFzNLE%2F-MZP4pywzUEHXqyAn-6R%2F2.png?generation=1619640410755807\&alt=media)

{% hint style="info" %}
30 hours is the maximum duration for a Sequence because this is the maximum value for Timecode data.&#x20;

1 second and 1 frame (00:00:01:01) is the minimum duration for a Sequence.
{% endhint %}