Field attributes are used to identify a field when the destination collection is unknown.
You can use attributes to get a field's value of a free document (Value by attribute function in a formula).
To add field attributes, open a collection and tap on the button (top-right corner).
![Collection menu](/img/screen/collection-menu.png)
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Select Fields in the menu.
![Edit field](/img/screen/fields-list.png)
![](/img/iphone-14-pro.png)
Select a field (such as Title).
![Field attributes](/img/screen/field-attributes-1.png)
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Tap on Attributes.
![Field attributes](/img/screen/field-attributes-2.png)
![](/img/iphone-14-pro.png)
Tap on New attribute.