Question: how to use freeze command?
Answer: Select the row below the row(s) you want to freeze. In our example, we want to freeze rows 1 and 2, so we'll select row 3. ... 
Click the View tab on the Ribbon.
Select the Freeze Panes command, then choose Freeze Panes from the drop-down menu. ... 
The rows will be frozen in place, as indicated by the gray line.