# Occurrence Id

> How occurrence IDs work in Asset Transformer Studio

An occurrence is identified by a unique numerical identifier, called `Id`.

The occurrence Id is an occurrence `property`, which can be found in the [Inspector](../../user-interface/window/inspector) panel, or by mousing over the occurrence in the [Product Structure](../../user-interface/window/product-structure-tree) panel (tooltip).

![Inspector ID](/api/media?file=/asset-transformer-studio/2026.5.0/media/STUDIO_Windows_Inspector-ID.jpg) ![ID tooltip](/api/media?file=/asset-transformer-studio/2026.5.0/media/STUDIO_Tooltip1.gif)

## Related Topics

* [Occurrence Properties](./occurrence-properties.md)