I'm trying to do some basic design in Microsoft Expression Design 4 (this is the best design tool I have available to me; suggestions welcome), and I'm trying to export slices by selecting a bunch of objects and using the right-click context menu to create a slice from the selection. Slices created like this always have 2px of transparency at the extremes of the vertical axis. How do I get my slices to have the exact dimensions of the selections used to create them?
Looks like there was an element in my design that was causing the slice to seem to be wrong. I had a vertical stroke, 6 pixels wide, with a horizontal gradient fill. The stroke itself was only 77 pixels long, but it was causing the slices to be 82 pixels high. I don't know why, but when I resized this stroke to 74 pixels, the slice dimensions were correct.
I discovered this by moving the slice bounds around and seeing the dimensions change as certain elements moved out of the bounds.