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Display the number of users for the selected object in the viewport, right next to its name

Reminder about Blender's Collection and User Logic

• a Blender file is nothing more than a container of Scenes
• a Scene is a container of Collections
• a Collection is a container of Objects
• an Object is a container of Data Block

Usage

To enable, go to: Object Properties > Viewport Display > Show, then choose one of:

• Data Name

• Data Users (Objects) (on by default)

• Data User Names

• Object Users (on by default)

• Object User Names

• To enable or disable these functions on multiple objects at once, highlight your objects and press ALT + CLICK on the checkbox of your choice.

Data

• Data Name: Shows the name of the data block.
• Data Users (Objects): Shows the count of object sharing the data block. This can also be found under Properties > Data (number displayed next to the data name).
• Data User Names: Shows the name of the object sharing the data block.

Object Users

• Shows the object's user count (Scenes + Collections)
• A * symbol will appear if temporary users have been detected (typically after Link Copying a Scene).

Object User Names

Although an object user is always a Collection, its User Names are separated in two categories for clarity sake:

• Scenes (= Scene Collections): list of the Scenes which use the object directly via their Scene Collection
• Collections: list of the user-made Collections that the object belongs to

This list is also available under Object Properties > Collections. However it is not as precise and won't show the exact name of the Scenes (it will just show 'Scene Collection').

About Multi-User Collections

• When a Collection is linked across other scenes, it is considered as a Multi-User Collection.
• An object located in a Multi-User Collection behaves differently, as it is influenced by actions from other users (Scenes) using that Linked Collection, sometimes leading to unexpected consequences.
• Example: Cube 1 is located in Collection 1, linked to Scene 1 and 2. Deleting Cube 1 from Scene 1 will delete it from Scene 2 since it is controlled by its Multi-User Collection
• If the object is in a Multi-User Collection, a ⚠ symbol is shown

Limitation

• Text color: may not match the transform color during modal transform operations.