X and Y coordinates - Confusion!

[Mike Kelly]

Hi,

I'm working a lot with nested movie clips, and I'm getting confused in my

attempts to reference their positions.  Can anyone explain:

1. What the "box of boxes" with the white square and black square options

exactly refers to; and

2. Any tips for trying to maintain one set of x,y cordinates throughout a

project, instead of having to translate between multiple ones.

Any general clarification or tips would be useful.

Thanks,

M