The Grow Properties Dialog allows you to change the sizing behavior of a shape from the Design tab.
There are four choices of sizing behavior:
Proportionally - objects have only four grow handles (one at each corner) and maintain their proportions when re-sized.
Horizontally Only - objects have only two grow handles and can be re-sized only in the horizontal direction.
Vertically Only - objects have only two grow handles and can be re-sized only in the vertical direction. This is good for objects that represent vertical lines.
No restrictions allow objects to grow in all directions without maintaining proportions. These objects have the usual 8 grow handles.
Independently Adjust Sides of Polygon Shapes
There's a special property that only applies to custom polygon shapes. When you create a custom shape using SmartDraw's polygon line tool you can adjust the shape by just extending one side.
To remove that ability, uncheck this option in the Grow Properties dialog box.
Unchecking the option, removes the green handles from the shape that lets you move only specific sides of a polygon.