Positioning question

I have simple question about positioning.

If I have the movie dimensions set to say, the default 550px X 400px. How can I determine where the movie clip boundaries are for the main timeline stage when create a new symbol? When I create a movie clip symbol or any symbol there are no boundaries for where the top, bottom, left and right margins are for the main stage.

Do I need to drag out guides set to the stage dimensions or is there another way to show the boundaries of the main stage in the symbol editing mode? Am I missing something really simple here? Or have I answered my own question?

Thanks.
-Dman100-

You can always use Edit in Place. That way, you’ll always be able to see the size of the stage on the background. It’s very handy, because you see the changes you made compared to everything else on the stage, unlike using Edit.

Well it is simply a grid you can use if you want objects to snap to certain points on that grid, so you can easily align them. It can be useful if you want two movieclips to be placed at the same height without too much mess for example.