Hi Jonathan,

Changing the measurement units from inches to centimeters in Excel is a simple process. Here's how you can do it:

1. Open your Excel sheet and click on the "File" tab in the top left corner.
2. Click on "Options" in the left-hand menu.
3. In the Excel Options window, click on "Advanced" in the left-hand menu.
4. Scroll down to the "Display" section and find the "Ruler Units" dropdown menu.
5. Click on the dropdown menu and select "Centimeters".
6. Click "OK" to save your changes.

Now, when you go to the "Format Autoshape" tab and click on "Size", you will see that the units have changed to centimeters.