This guide describes how to reorder multiple columns in Power Query with Drag & Drop, without having to move each column individually.

Then, in the Power Query Editor, select the headers of all the columns you want to unpivot. In this example, you'll need to click the "2020" header, press Shift, and then click the "2024" header.

This article shows how Microsoft Power Query for Excel can streamline the ongoing delivery of additional data for analysis by PivotTables.