When you work with canvases in Oracle Forms, the relationship between a canvas and its view is a fundamental concept. Think of the view as a rectangle positioned over the canvas; the area of the canvas visible within the view is what end users see when the canvas is displayed at runtime.
For a stacked canvas, you can specify the size of the view at design time by setting the View Width and View Height properties. For a content, tab or toolbar canvas, these properties are ignored because the view size is determined by the size of the window itself. Changing the size of the window at runtime (e.g., resizing it with the mouse) effectively changes the size of the view for that window's content canvas.
For any type of canvas, you can set properties that specify the view's point of origin on the canvas; that is, to position the view rectangle at a specific location on its canvas. Moving the view, like resizing the view, changes the part of the canvas that end users see in the window at runtime. When a content canvas is larger than its view (that is, larger than its window), the window can be scrolled to change the position of the view on the canvas, thus making a different part of the canvas visible.