At runtime, the stacking order you established at design
time changes as canvases are raised in response to navigation and programmatic
control.
When an end user or the application navigates to an item on
a canvas that is hidden behind another canvas, Oracle Forms automatically
raises the target canvas to the front of the window, thus changing the current
stacking order. (Therefore, if you design your form such that stacked or tab
canvases always are invoked in response to navigation, the design-time stacking
order is unimportant.)
Similarly, if you execute the SHOW_VIEW or SET_VIEW_PROPERTY
built-in procedures to display a canvas programmatically, Oracle Forms displays
the indicated canvas in front of all other canvases displayed in that same
window.
