Both Excel 2007 and 2010 make editing or modifying axis names a short and relatively easy task when the originals are inadequate or provide incorrect information.

How to Add a Second Y-Axis on Excel & Make a Second Series at the End of the Chart. Microsoft Excel charts give you a large number of options for displaying the data in your spreadsheet.

This article explains how to add a secondary axis to a chart in Excel so you can view unlike categories on the same graph. These instructions work in Excel in Microsoft 365, Excel 2021, Excel 2019 ...

If you have uneven distribution of data in your Excel chart, here is a better way to change the automatic axis settings.