The Change Shape feature allows you to change a Visio shape to any other Visio shape. This feature can be used to change a shape "on the fly" while working in Visio.
To use this feature, right-click a shape on the Visio page, right-click, and select D-Tools > Shape > Change Shape.
The Change Shape form will open.
Choose whatever shape you want and then click Change. At the bottom of the form, you have the option of assigning this shape as the default shape for the Product, Category, and Subcategory if you wish.
In this example, I chose the "Line Image" shape and the shape has now been replaced with the one chosen.
You will need to resize and reposition the shape and reconnect any wires previously attached to the old shape.