 So, one of the things that we've learned in Excel so far is that we are able to work with different cell ranges. But one of the things we can do with these cell ranges is, obviously, I can make a simple entering of a five at B14 and then right beside that say B14. That's not terribly anything new, but what we're able to actually do is we're able to start to order organize things a little bit differently when we start working with multiple sheets. Say, for example, I've got quarters one through four going on here, and I want to do pretty much the exact same thing in each of them. Now, yes, I could go through the long process of copy and pasting, but if I wanted to go one step further, one step faster, what I'm able to actually do is I'm able to hold down my shift key and then press quarter four. Now, what you should see happen is all of my categories, all my worksheets here have just become highlighted. If I click on any one of these, you notice they're still technically highlighted. There's a little line right here, but now when I make a change, say, for example, I click the auto sum button in quarter one. As soon as I hit enter, not only does that change happen in quarter one, but quarter two now has it, quarter three now has it, quarter four now has it. Again, if I go to quarter three and let's say I use the auto fill function and I just click hold and drag across, what I should get is all of my categories have been selected. Now, one of the things I might need to do is obviously once I've selected this, how do I get away with it? Or how do I uncheck them? I just simply have to click documentation. The reason why is because documentation is not part of the group, so if I were to only have quarter one and quarter two, if I clicked on quarter four, for example, we'd ungroup it. And you might be asking yourself, what happens if all of them are selected? If I click on one, that gets rid of them.