You can freeze a row in Excel through the "Freeze Panes" menu. This lets you scroll through a spreadsheet without that frozen data leaving the screen.

You can search in Excel with the Search Sheet bar, and use Find and Replace to swap out terms or values. Here's how to do it.

The simplest way to think about SCAN is that it applies a custom calculation to each element in a range/array and returns every intermediate result it produces along the way. If that sounds abstract, ...