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# Selecting the default template
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AWS MGN uses the version of the Launch template that is marked as default. 

In order to select the default launch template, on the **Modify template (Create new version)** page, under the **Launch template name and version description** category, open the **Source template** menu and choose the EC2 launch template you want to use as the default template from the drop-down menu. 

Every time you modify the Launch template, a new version of the launch template is created. You are notified that the Launch template has been modified and that a new version (version number) has been created. Make sure to take note of the version number and the **Launch template ID** so that you could easily identify your launch template and version.

**Note**  
It's good practice to delete versions of the launch template that you no longer need. 

To set the new version of your launch template as the default:

1. Navigate back to the main **EC2 > Launch templates** page.

1. Choose your launch template by selecting the toggle to the left of the **Launch template ID**.

1. Open the Actions menu and choose **Set default version**. 

1. Select the **Template version** from the drop-down menu and then choose **Set as default version**.

The Amazon EC2 console confirms the version change.