# Selection Menu > Asset Transformer Studio Selection menu reference ![Selection Menu](/api/media?file=/asset-transformer-studio/2026.5.0/media/STUDIO_Menu_Selection.jpg) The **Selection** menu contains a set of functions to quickly and automatically select [parts](../../data-preparation-fundamentals/glossary#part-occurrence) in the scene. > **Warning:** > > In Asset Transformer Studio, when a function requiring a selection of occurrences is executed **with an empty selection**, the whole scene will be processed. More information [here](../../data-preparation-fundamentals/general-information/about-studio-and-selections). | Menu option | Description | Keyboard Shortcut | | ------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------- | | **Select All** | Selects all [part occurrences](../../data-preparation-fundamentals/about-occurrences/occurrence-types) (or parts) from the scene (visible and hidden) | CTRL + A | | [**Invert Selection**](/asset-transformer-studio/2026.5.0/api/python/scene_functions.md#invertselection) | Switches the current selection | CTRL + I | | [**Clear Selection**](/asset-transformer-studio/2026.5.0/api/python/scene_functions.md#clearselection) | Clears the current selection | CTRL + SHIFT + A | | **Find Selection In Tree** | Used to find the current selection in the [Product Structure (Tree)](../window/product-structure-tree) | CTRL + F | | **Isolate Selection** | Displays the current selection in a temporary view, in order to visualize it and process it independently from the whole scene | SPACE | | **Select Ancestor** | Selects the first common ancestor of the current selection | \< | | **Select Children** | Selects the children for each occurrence of the current selection | > | | **Select Hidden Parts** | Selects all Parts *not* visible in the viewer (shown in the No-Show view), i.e. with their `Visible` [property](../../data-preparation-fundamentals/about-occurrences/occurrence-properties) disabled. [Select Hidden Parts](https://www.youtube.com/embed/X9POUxB29UY?si=a-lK9NAsSlu7dXIa) | | | [**Select Visible Parts**](/asset-transformer-studio/2026.5.0/api/python/scene_functions.md#getvisiblepartoccurrences) | Selects all Parts visible in the viewer | | | [**Select By Maximum Size**](/asset-transformer-studio/2026.5.0/api/python/scene_functions.md#findpartoccurrencesbymaximumsize) | Selects Parts within a specified maximum Bounding Box diagonal size. [Select By Maximum Size](https://www.youtube.com/embed/MqYaCv7xA1o?si=00tye0JypTgtnJ3o) | | | [**Identify by Instances**](/asset-transformer-studio/2026.5.0/api/python/scene_functions.md#findpartoccurrencesbyminimumnumberofinstances) | Selects Parts that are instantiated in the scene more than the specified value. [Identify by Instances](https://www.youtube.com/embed/NZZ1VCUEusk?si=y2tUy_egkd_N5rAe) | | | [**Select Instances**](/asset-transformer-studio/2026.5.0/api/python/scene_functions.md#getinstances) | Selects all the instances of the currently selected occurrence (providing it is instantiated multiple times in the scene) | | | [**Select Similar Parts**](/asset-transformer-studio/2026.5.0/api/python/algo_functions.md#findsimilarpartoccurrencesfast) | Scans the entire scene to identify parts similar (geometrically identical) to the current selection (select Parts before using). [Select Similar Parts](https://www.youtube.com/embed/FY8JsQF1kDk?si=Ir4XvEvpFPsANjo3) | | | [**Select Duplicated Parts**](/asset-transformer-studio/2026.5.0/api/python/scene_functions.md#findduplicatedpartoccurrences) | Select duplicate parts, meaning identical parts that are superimposed (with similar size, polygon count, position and orientation).**NOTE**: Requires tessellated objects (meshes): will not work with CAD/Brep objects. [Select Duplicated Parts](https://www.youtube.com/embed/YC5tHZANC9g?si=F9zKWQ7E9UWuKLrO) | | | [**Select Occluded Parts**](/asset-transformer-studio/2026.5.0/api/python/algo_functions.md#findoccludedpartoccurrences) | Selects Parts not viewed from a set of cameras placed spherically around the selection. Works the same way as the **Hidden Removal** function, but is not destructive (selects only).**NOTE**: Requires tessellated objects (meshes): will not work with CAD/BRep objects. [Select Occluded Parts](https://www.youtube.com/embed/NGzovtQ4AzA?si=uC1DPa4lMhIkSWRl) | | | [**Select Occluded Parts (Advanced)**](/asset-transformer-studio/2026.5.0/api/python/algo_functions.md#findoccludedpartoccurrencesadvanced) | Selects Parts not viewed from a set of cameras automatically generated and scattered around the selected model.**NOTE**: Requires tessellated objects (meshes): will not work with CAD/BRep objects. | | | [**Select By Material**](/asset-transformer-studio/2026.5.0/api/python/scene_functions.md#findpartoccurrencesbyvisiblematerial) | Allows you to select Parts from the scene that visually show a given material (independently from how the material is actually set, be it as a Material Property, applied to patches, or inherited from a parent) | | | [**Select By Metadata**](/asset-transformer-studio/2026.5.0/api/python/scene_functions.md#findoccurrencesbymetadata) | Selects all occurrences sharing an identical metadata property | | | [**Select By Property**](/asset-transformer-studio/2026.5.0/api/python/scene_functions.md#findoccurrencesbyproperty) | Allows you to select occurrences sharing an identical property, among the default properties like **Name**, **Material** or **Visibility**, or custom user-defined properties | | > **Note:** > > Advanced selection tools like `Select By Maximum Size`, `Select Parts from No Show`, `Identify Instances`, `Select Instances` and `Select Similar` will definitely ease and accelerate your data preparation processes in Asset Transformer Studio. Other "smart" selections can be achieved through Python scripting.