Use Presets to specify default properties for new components and assets. You cannot set the default properties for Settings Managers.
When you add a component to a GameObject or a new asset to your project, Unity uses a default Preset to set the properties of the new item. Default Presets override the Unity factory default settings.
Unity also uses default Presets when you use the Reset command in the Component Context Menu in the Inspector window.
For Transform components, Unity does not use the position in a default Preset when you add a new GameObject to a scene. In this case, the default position is the middle of the Scene view. Use the Reset command to apply the position, as well as the rotation and scale, of a default Preset for a Transform.
Specifying a Preset to use for default settings
You can specify a Preset to use for default settings with the Inspector window, the Preset Manager, or by dragging and dropping.
To specify default settings with the Inspector window:
Select a Preset in the Project window.
In the Inspector window, click Set as Default.
To specify default settings with the Preset Manager:
If you don’t already have a Preset in your project to use for default settings, create one.
Open the Preset Manager by choosing Edit > Project Settings > Preset Manager.
Click + and select the item that you want to use with a default Preset. A default Preset for the selected item appears in the Preset Manager list.
Drag and drop a Preset from the Project window to the Preset Manager to add a new default Preset or change an existing default Preset.
Changing and removing default Presets
Use Preset Manager to change a default Preset. You can also drag and drop a Preset from the Project window to the Preset Manager to change an existing default Preset.
There are two ways to remove a default Preset: from Preset Manager or from the Inspector window.
To change a default Preset in Preset Manager:
Open the Preset Manager by choosing Edit > Project Settings > Preset Manager.
Click the drop-down menu next to the default Preset of an object type to select a Preset. The selected Preset becomes the new default Preset.
To remove a default Preset in the Inspector:
Select a Preset in the Project window.
In the Inspector window, click Remove From.
To remove a default Preset in Preset Manager:
Open the Preset Manager by choosing Edit > Project Settings > Preset Manager.
Select the default Preset that you want to remove from the list of default Presets.
Is something described here not working as you expect it to? It might be a Known Issue. Please check with the Issue Tracker at issuetracker.unity3d.com.
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