> ## Documentation Index
> Fetch the complete documentation index at: https://docs.labelbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Manage selections

> Describes the Selection menu and Smart select, which helps manage selected data rows.

When you use **Catalog** to select one or more data rows, the **Selection menu** displays the number of rows selected.

When you open the **Selection menu**, you can perform a number of actions on the selected data rows:

| Command | Description |
| - | - |
| *Preview selection* | Displays selected data rows in a [detailed view](/horizon/guides/catalog-overview#gallery-view). |
| *Add batch to project* | Groups selected data rows into a batch and then opens the **Review batch** view, which lets you queue data rows for [labeling](/horizon/guides/batches#submit-a-batch-to-a-labeling-project). |
| *send to Annotate* | Send data row [prediction(s)](/horizon/guides/foundry-annotate-predictions#send-predictions-to-annotate) to a project |
| *New Experiment* | Send data row selection to a [new experiment](/horizon/guides/create-a-model-run#option-1-send-to-a-new-experiment) |
| *Send to Experiment* | Send data row selection to an [existing experiment](/horizon/guides/create-a-model-run#option-1-send-to-a-new-experiment) |
| *Add metadata* | Opens the **Add metadata** panel for the selected data rows; this lets you [assign metadata values](/horizon/guides/datarow-metadata#bulk-add-metadata) to the selected rows.Metadata values [must exist](/horizon/guides/datarow-metadata#create-custom-metadata-schema-via-the-ui) before they can be added to data rows. |
| *Add classification* | [Assigns a classification](/horizon/guides/bulk-classification#step-2-add-a-classification) to the selected data rows.The classification must already exist and be defined by an ontology associated with a project. |
| *Export data v2* | Opens [the Export panel](/horizon/guides/export-from-catalog#step-2-select-export-fields-to-include), which lets you create a JSON file designed to export the selected data rows using the settings defined in the panel. |
| *Select all* | Selects all data rows currently in view. |
| *Deselect all* | Clears data row selections. |
| *Delete data rows* | Deletes selected data rows, after confirmation. For details, see [Delete data rows](#delete-data-rows). |

## Delete data rows

When you delete data rows, a confirmation prompt asks you to confirm your decision.

To continue, enter the word `delete` and then select the **Delete** Button.

Note that data rows and additional details, such as annotations (label), metadata, classifications, and so on, are permanently removed. Use care when deleting data rows; this is a permanent action that cannot be reversed.

If you accidentally delete the wrong data rows, you need to import the original data and add previous details.