project = New Project();
project << Add Bookmarks(
			Group(
				"Sample Data",
				Expanded( 1 ), // open the group
				{File( "$SAMPLE_DATA/Air Traffic.jmp" ),
				File( "$SAMPLE_DATA/Big Class.jmp" )}
			)
);
project << Set Layout(
	H Splitter Box(
		<<Set Sizes( {0.15, 0.85} ),
		Tab Page Box( Window ID( "Bookmarks" ), )
	)
);
project << Save( "$DOCUMENTS/My Project.jmpprj" );
Figure 14.3 “Sample Data” Group in a Project

Help created on 7/12/2018