A vertical layout of a grid-based design usually alternates gap columns (i.e., empty columns whose the only purpose is to separate components) and component columns (i.e., columns whose purpose is to hold components). Similarly, a horizontal layout alternates gap rows and column rows.
Many advanced tools for grid-based layout design reflect that and create this structure automatically. See, for example, JFormDesigner.
It would be nice to have this kind of support in grid designer in NetBeans.
implemented in jet-mail:
Integrated into 'main-golden'
User: Petr Somol <firstname.lastname@example.org>
Log: #198435: Gap support in Grid Designer initial implementation