The Multi-space plugin allows for the creation of multiple independent data spaces through logical isolation within a single application instance.
In the plugin manager, find the Multi-Space plugin and enable it.

After enabling the plugin, go to the "Users & Permissions" settings page and switch to the Spaces panel to manage spaces.
Initially, there is a built-in Unassigned Space, which is mainly used to view old data that is not associated with any space.

Click the "Add space" button to create a new space:
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After selecting a created space, you can set the users belonging to that space on the right side:
Tip: After assigning users to a space, you need to manually refresh the page for the space switching list in the upper right corner to update and display the latest space.

You can switch the current space in the upper right corner. When you click the eye icon on the right (in its highlighted state), you can view data from multiple spaces simultaneously.

After enabling the plugin, the system will automatically add a Space field when creating a collection. Only collections that contain this field will be included in the space management logic.

For existing collections, you can manually add a Space field to enable space management:

In collections that contain the Space field, the system will automatically apply the following logic:
For data that existed before the Multi-space plugin was enabled, you can classify it into spaces through the following steps:
Manually add the Space field to the old collection:

Associate the user who manages the old data with all spaces, including the Unassigned Space, to view data that has not yet been assigned to a space:

At the top, select to view data from all spaces:

Create a new page for old data assignment. Display the "Space field" on the list page and edit page to manually adjust the space assignment.

Make the Space field editable

Through the page created above, manually edit the data to gradually assign the correct space to the old data (you can also configure bulk editing yourself).