The Relationship Tool
If you are on the view you can select an object form where you want to create a relation to an other object. If you select the object you will see 4 buttons around the object. If you click the relationship tool button an arrow will appear. If you click with this arrow on an other object the following list will pop up:
Here you see three sections: Use Existing, Add new and Add alternative.
Use Existing: Shows you all the relations that are already used in the tenant between these two objects. If you click on them it will show you a dropdown list with the label of each relation.
Add new: Shows you all the relations that are activated and possible between the two objects so you can create a new relation with a new label.
Add alternative: Shows you the possibility to create an derived relation if possible by the Archimate rules.