How do I stretch picture to window?

hi

in my app i did this: if app is in portrait resize background to 480x and 800y, if the app is in landscape resize to 80x and 480y.

It is possible instead of using a size, tell the background picture to resize to the window app size?

You mean like this?

set width to viewportright(0)-viewportleft(0)

set height to viewporttop(0)-viewportbottom(0)

Thanks LittleStain