Learn how to use the Vizrt Colin plugin.
The Vizrt Colin function stands for container align and can be used to align containers within your scene design. If you have a couple of containers in your scene design and they are not properly aligned you can drop the Colin function on one of the containers to align the other two.
Once you're in the Colin editor you'll see two empty boxes. These empty boxes are labeled Container (1) Left and Container (2) Right. Since the label says container, that means those empty boxes are meant to have some containers from the scene tree placed into them. Once you have a container in one of the corresponding boxes it takes over the position transformation.