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Collections are saved groups of data units or labels that let you curate subsets of your data and perform bulk actions on them. Rather than repeatedly re-applying the same filters, you save the results as a Collection and act on it directly — whether that means sending items to annotation, running bulk classifications, or exporting a curated dataset. Collections are available in two places in Encord:
  • Data > Explore — for organizing files in the Index
  • Project > Explore — for organizing data units and labels within a project

Collection types

The collection types available depend on where you are working:
ContextCollection typeUsed for
Data > ExploreFileGrouping files in the Index for export or dataset creation
Project > ExploreDataBulk workflow actions on tasks and frames (re-open, prioritize, bulk classify, model evaluation)
Project > ExploreLabelBulk label actions (edit object class, delete labels)

Create a collection

The creation flow is the same in both Data > Explore and Project > Explore.
  1. Go to Data > Explore or open a project and navigate to the Explore tab.
  2. Search, sort, and filter your data until you have the subset you want to save.
  3. Select one or more data units by clicking the checkbox on each data card. To select everything matching your current filters, click Select all in the action ribbon at the bottom of the screen.
  4. Click Actions or press A.
  5. Select Add to collection.
  6. Click the + New Collection tab.
  7. Enter a Collection Title (required) and an optional Collection Description.
  8. If working in a project, select the Collection Type:
    • Data — for bulk workflow and task actions on frames.
    • Label — for bulk label actions (not available in the prediction domain).
  9. Click Create & add or press Enter (Mac) / CtrlEnter (Windows).
The collection is created and the selected items are added to it. A confirmation notification appears once the operation completes.
You can also type a name directly in the Search collections… field on the Existing Collection tab to create a collection inline without switching tabs.

Add items to an existing collection

  1. Select the data units you want to add.
  2. Click Actions or press A, then select Add to collection.
  3. On the Existing Collection tab, search for and select the target collection.
  4. Click Add.

Remove items from a collection

  1. Apply a collection filter so you are viewing items within that collection.
  2. Select the items you want to remove.
  3. Click Actions or press A, then select Remove from collection.
  4. Select the collection to remove the items from.
  5. Click Remove.

Manage a collection

Once a collection exists, you can access management options from the Filter panel. Click the ellipsis icon () next to a collection name to see the available actions.

Actions available in both Data > Explore and Project > Explore

ActionDescription
View in ExplorerApplies the collection as a filter and navigates to the filtered view
Add to DatasetAdds the collection’s items to a dataset
Edit DetailsRenames the collection or updates its description
Download CSVDownloads the collection contents as a CSV file
DeletePermanently deletes the collection

Project > Explore only

ActionDescription
Task ActionsPerforms bulk task actions (re-open, prioritize, etc.) — Data collections only
Bulk ClassifyApplies a classification to all items in the collection in bulk
Convert CollectionConverts a collection between Data and Label types
Edit Object ClassEdits label classes across all items in the collection — Label collections only

Edit collection details

  1. Click Filter or press F.
  2. Click the ellipsis icon next to the collection.
  3. Select Edit Details.
  4. Update the Collection Title or Collection Description.
  5. Click Submit.

Export a collection as CSV

  1. Click Filter or press F.
  2. Click the ellipsis icon next to the collection you want to export.
  3. Click Download CSV.

Delete a collection

Deleting a collection is permanent. The data units or labels within the collection are not deleted — only the collection grouping itself is removed.
  1. Click Filter or press F.
  2. Click the ellipsis icon next to the collection.
  3. Select Delete and confirm.