Common Region

Elements within the same clearly defined boundary are perceived as a group.

Elements tend to be perceived into groups if they are sharing an area with a clearly defined boundary.

Common region is the principle of grouping elements based on the boundaries or borders that separate them. Objects contained within the same region are seen as belonging together, while those in different regions are perceived as separate.

Further Reading

Law of Common Region | Laws of UXLaws of UX

The Principle of Common Region: Containers Create GroupingsNielsen Norman Group

Further Viewing