The Shape Properties Dialog allows you to change the sizing and other behaviors of a selected shape. Access the Shape Properties dialog from the right-click menu.
There are four choices of sizing behavior:
Proportional objects have only four grow handles (one at each corner) and maintain their proportions when re-sized. Imported images (and many library symbols) are initially set to resize proportionally.
Horizontal Only objects have only two grow handles and can be re-sized only in the horizontal direction.
Vertical 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.