You can watch a video tutorial here.
Freezing a pane is commonly used when scrolling through large amounts of data on a worksheet. When scrolling through a sheet that has a lot of data and either column headers or row names, it is difficult to keep track of the name of the row or column. Freezing either a row or column makes it possible to keep the row name or column header in place while you scroll through the rest of the data.
Step 1 – Select the source
– Select the cell at the location of which the rows above and columns to the left are to be locked
Step 2 – Navigate to the Freeze Panes option
– Go to View > Window
– Expand the Freeze Panes dropdown
Step 3 – Choose an option
– Select Freeze Panes
Step 4 – Check the result
– Scroll to the right
– Scroll down
– Multiple panes above and to the left of the cursor remain frozen