(Forms Builder Components (continued oracle 10g

Canvases: A canvas is a “surface” where visual objects, such as graphics and items, are arranged. A form module can have several canvases (like the pages of a paper form). A canvas can display items from one or more blocks. To see a canvas and its items, you must display the canvas in a window. By default, all canvases in a form appear in the same window (which could mean you see only one canvas at a time), but you can assign separate windows for each canvas so that several canvases can be viewed at once.
Note: Items in one block do not need to be physically grouped. They can span many canvases (and windows).
Instructor Note
A canvas is like a picture portrait, and a window is like a picture frame. Just as you need a picture frame to display a picture portrait, you need a window to display a canvas and its contents.