AutoFormat

I thought I would "jazz" up some of my dull old forms yesterday & started out using the AutoFormat button on the Access toolbar. It is a nice feature but I noticed that after completion of one or two small forms the size of the Db was starting to blow out. While the "bloat" wasn't too big I suspect that if I were to dive in and "jazz" up all the old forms I would see a big increase in Db bloat. Is this common when using the AutoFormat feature? Like many good features in Access I am guessing it comes at a cost.