See more Excel demos at http://office.microsoft.com/en-us/help/FX100485311033.aspx
Navigating a large, complex worksheet with thousands of cells can be a challenge sometimes. The problem is that, as you scroll down, the column and row labels are no longer visible, so it's hard to tell what the data you're looking at refers to. By using the Freeze Panes command in Excel, you can make sure specific rows and columns stay visible while you scroll. Watch the demo to learn how to freeze and unfreeze rows and columns, and make viewing your worksheet a snap.