Enable Fill and Cell drag and drop in Excel

I was scratching my head for sometime on this.I just wanted to keep it in my blog, so that i know where to get it from next time i lose it.The filling of cells by dropping makes copying in excel extremely fluid.But this option gets lost when you play around with excel in different formats.But this is what you need to do in case you lose yours.Go to File–>Options and then go to “Advanced” tab.Just check the enable fill handle and cell drag and drop checkbox.