How to put existing tab canvas on a newly created content canvas

Hi fellas,

                               Before few days i got a oracle form which has a tab canvas to display the items of the form. One particular tab include 2 buttons which have to be common to all three tabs. At that time it only belongs to the first tab of the canvas. Part of my task is to make those to buttons common to all three tabs. Given solution is for this is create a new content canvas and place existing tab canvas on that content and place above mentioned two buttons on the content canvas. Content canvas should be larger than the tab canvas. Other wise those button wont get display on the form.
                               If you have to create both the content canvas and tab canvas you can simply create a content canvas and can draw a tab canvas on that content canvas. No need to have set any property or anything else for that. But when you have a existing tab canvas, you just cannot create new content canvas and place or set the tab canvas on that. In a situation like this we can use different method to do this.
                               First create a content canvas and make it larger than the existing tab canvas. Then double click on the new content canvas and click on the VIEW tab of the form builder and select STACKED VIEWS.. After that you will get a window which is showing the existing canvases.

                         In that window you can select the canvas you need to set on the newly created canvas. Now Our tab canvas is displaying on the content canvas and simply we can place the above mentioned two buttons on the content canvas. Now those two buttons are common to all three tabs. We don't have to set any kind of property for this.