[shungo]

I have a large document that whenever I make changes to a table within the
document, such as left justifying a column, it applies the change to the
entire document. This process takes a while. Then when its finished I hit the
undo changes arrow and then the change only takes effect as I intended it to
in the first place.
How do I stop the change from effecting the whole document and just to the
highlighted/selected area I would like it to apply to?