How to set graphics priorities...?

Hi all,
I scoured Google and this forum and couldn’t find a hint of what I’m referring to, hence my asking in a thread.
The only references I could find anywhere referred to “priorities” as pertaining to event listeners and the order certain functions should be executed in, etc. Those aren’t the kind of “priorities” I mean. Rather, think of the graphics in arcade, Nintendo or even C-64 games. The graphics are what I’m trying to figure out. Maybe with Flash/Actionscript the term “priority”/“priorities” is called something else…? I’m sure anyone reading this should understand what I mean by now, due to my long-winded explanation.
Can anyone advise me as to how to set graphic priorities? Ie., this graphic is displayed under or over another graphic…?
Thank you so much in advance :slight_smile: