If you need to create a Custom Relationship Type beyond the default selection, this can be done in your Settings.
Note: Only an Admin User has the Permissions to create a new Relationship Type.
Navigate to Settings > Data Customization > Relationship Types
Select "Create a Relationship Type" in the top right corner and a pop-out window will open.
Here, you can enter the necessary details for your custom Relationship Type.
Select "Save Relationship Type" and this Relationship will now be available to use in your Virtuous database.
It's best to plan your custom Relationship Types BEFORE creating them in Virtuous as it is not possible to edit the Inverse Relationship on a Custom Relationship Type after initially creating it.
To learn more about how Relationships function, check out this support article.