Glue allows objects to be attached to each other. Glued Objects will behave as a single object in the Hype.
A selected object can be glued to another object by dragging from the glue icon to the object it should be glued to. The selected object will become a child of that object.
Tapping the glue button opens a popup of glue details from which glue connections can be removed.
Glued objects are referred to as a child, and the target object is referred to as a parent. If the glued object has a Physical Node attached, it will inherit physical properties from the parent object. However, its physical material can be changed individually.
For more on gluing objects check out the How to make characters and new items by gluing article.