About Canvases
A canvas is a surface--inside a window container--on
which you place the interface items and boilerplate objects that end users
interact with when they run the form. By default, any canvas you create at
runtime is assigned to the window named WINDOW1. To explicitly associate a
canvas to a specific window, set the canvas' Window property accordingly. While
you can create and delete canvases in the Object Navigator, you will use the
Layout Editor to accomplish most of your canvas-related tasks.
