Boundary draws a multiline around the selected topic and it's all subtopics for emphasising them.
Click menu items in "Format->Boundary" to format a selected topic's boundary.
"1"Set boundary fill.
"2"Set boundary border line color and boundary line fill pattern.
Select a color from color template：
Click "Format->Boundary->Border->Pattern" menu item, in it's submenu select a fill pattern for the boundary border line：
"3"Click "Format->Boundary->Weight" menu item, choose a size for the boundary border thickness.
"4" Click "Format->Boundary->Shape" , in the pops up menu, choose a shape for selected topic's boundary.
If your choose "No boundary" menu item will delete an existing boundary.