transparent background leaks beneath border?

[VaporAction]

is it possible for a gif's transparent background to extend past its border?when I say border, I mean the black border that frames the image in photoshop...

I ask because I seem to be getting a space beneath my image when I embed into my web page and I've taken care of the html side of things (all padding and margins set to 0px, etc.)...

 

[jimoblak]

The black border is the edge of your image file. If you need more space for the image, expand the 'canvas' under the Image menu.

 

[VaporAction]

I'm sorry my question wasn't clear...
I'm not trying to extend or enlarge the image...
I'm concerned that my gif's transparent background is extending past the visible border of the image and am wondering if that is possible or if the image completely stops at its border?