Stacked Canvas:

What is a Stacked Canvas?

A stacked canvas is shown on top of, or stacked on the content canvas assigned to a window. This shares a window  with  a  content  canvas  and  any  number  of  other  stacked canvases. Stacked canvases are generally smaller than the window in that they display.

Determining the Size of s Stacked Canvas

Stacked  canvases  are  classically  smaller  than  the  content  canvas  in  the  similar  window. Determine the stacked canvas dimensions through setting height and width properties.  Determine the stacked canvas views dimensions through setting Viewport Height properties and Viewport Width.