> ## Documentation Index > Fetch the complete documentation index at: https://viewerdocs.planpoint.io/llms.txt > Use this file to discover all available pages before exploring further. # Collections > Group related units into curated collections that visitors can browse in the viewer Collections let you organize units into groups such as **City Studios**, **Penthouses**, or **Investment Units**. When a project has collections, visitors first see the collection list and can open a collection to browse its assigned units. Open your project, go to **Content**, and select the **Collections** tab. Click **+ New collection**, enter a name, and click **Create**. Use a clear, unique name because it is shown to visitors and used to connect units to the collection. Project Collections tab with the New collection action highlighted Click **Assign units** beside the collection. Units already in the collection are selected when the panel opens. Keep the units that should remain, select or deselect a floor to change all of its units at once, or select and deselect individual units. Use **Select all** when the collection should contain every unit in the project, then click **Apply collection**. Applying replaces the collection's membership with the units currently selected in the panel. Deselected units are removed from this collection. The collection name shown beneath a unit indicates its current assignment, and selecting a unit from another collection moves it automatically. To remove every unit, click **Clear**, then **Apply collection**. Assign units panel with individual units and a complete floor selected before applying the collection Return to **Collections** and click **Edit** beside the collection. You can configure: * **Name**: the title visitors see. * **Link slug**: the final URL segment used for a pretty-path link, such as `city-studios` in `yoursite.com/pricelist/city-studios`. * **Image**: the collection cover image. Upload a PNG or JPEG within the dashboard's file-size limit. * **Message**: optional supporting text shown on the collection card. * **Featured**: visually emphasizes the collection in the viewer. Changes save as you make them. Click **Done** to close the panel. Collection Edit panel with name, link slug, image, message, and featured settings highlighted Drag collection rows up or down to control their order in the viewer. The unit count beside each collection helps you confirm that assignments are connected. Click **Copy link** to copy a URL that opens the viewer directly on that collection. For other linking options, see [Deep Linking to specific units](/link-units#linking-to-a-collection). Collection list with drag ordering and Copy link actions highlighted Open the project viewer. The collection cards appear before the unit list. Select a collection and confirm that it contains the expected units and that its image, message, and featured styling appear correctly. Viewer showing collection cards and the highlighted building floors represented by a selected collection Collection assignments use the collection name. If you rename a collection after assigning units, open **Assign units**, select the affected floors or units, and apply the renamed collection again. Before deleting a collection, reassign its units in bulk or clear them individually from the **Units** tab because deleting the collection does not clear their existing assignment. ## Managing collections * **Assign units**: edit the complete collection membership by selecting or deselecting floors and individual units, then apply everything in one action. * **Reorder**: drag a row to change where the collection appears. * **Copy link**: copy a direct link to the collection. * **Edit**: update its name, link slug, image, message, or featured status. * **Delete**: permanently remove the collection. Only project owners and administrators can delete collections. You can still change one unit at a time from its **Edit** panel in the [Units](/units) tab.