About Stacking Order in Oracle Forms

When you work with canvases, you must define each canvas' position in the stacking order, with respect to other canvases assigned to the same window. The stacking order determines which canvases are displayed in front of (or "on top of") other canvases in the same window. The stacking order of canvases can change at runtime in response to navigation and programmatic events. Stacking order is important, particularly when you have multiple content and stacked canvases assigned to the same window. You always should position a stacked canvas in front of any content canvas(es) assigned to the same window; if not, the content canvas(es) will completely obscure the stacked canvas(es) at runtime.