The LAYOUT command provides layout control throughout a definition, in a tab (or chapter) and in a group.
Layout in a definition
The last layout command specified in a definition takes precedence. The layout specified affects all tabs (or chapters) in the definition, including individual properties, and entire groups of properties (not the properties in the group if overridden by a layout statement in the group).
Layout in a tab (or chapter)
The last layout command specified in a chapter takes precedence. The layout specified affects all individual properties in the chapter, and entire groups of properties.
Layout in a group
Layout can be specified with a GROUP statement. Groups, in general, cannot be specified in other groups.