Final answer:
To apply the Ion theme in Excel, open the workbook, click the 'Page Layout' tab, then 'Themes', and select 'Ion' from the dropdown menu.
Step-by-step explanation:
Applying the Ion Theme in Excel
If you're looking to apply the Ion theme to your current worksheet in a program like Microsoft Excel, you can do so by following a few simple steps. First, open the workbook where you want to apply the theme. Then, select the Page Layout tab on the ribbon at the top of your Excel window. In the Themes group, click the Themes button. A dropdown menu will appear displaying various themes. Scroll down and find the Ion theme. Click on the Ion theme to apply it to your entire workbook. All the sheets within the workbook will now reflect the Ion theme with its specific color palette, fonts, and effects.