Name Instances
You can name Instances in order to identify them.
Right-click on the current Instance to open the Timeline’s contextual menu, and click on Rename. You will be able to rename Current Instance or All Instances. A window will then appear: enter a new name for the Instance(s) and click on OK to apply the changes. The new name appears below the selected Instance(s). You can also rename them one by one:

If you choose to rename All Instances, you will get the following result:
The Reset option will let you cancel these modifications.