When you are working on a large spreadsheet, looking at information at the bottom means that you can’t see the column names. You have to use the scroll wheel to move up and down to see the corresponding information. There is an easy way to fix this display problem.
Select the line under the one you want to fix and click on its number. Next click on the “Windows” menu and click on “Fix”.
Now when you move up and down on the file, the part before the fixed point will stay visible, with the column titles.
This is greatly appreciated when the list is long, and it would be a shame not to take advantage of it.