You can change the color of the border of a graphical, image, or textual region, or of all the borders in a class, by specifying a make border COLOR statement; for example:

 

make Inventory border color ColorChoice

 

You can change the visibility of the border by specifying a make border visible or make border invisible statement; for example:

 

make Tennis in Sports border invisible

 

To change the border's visibility and color, you must write two statements; for example:

 

response to ...

    make Inventory border visible

    make Inventory border red

 

You can use the border of built-in function to find out the current color of a border during runtime. If the value returned is negative, the border is also invisible.