Set one or more print areas in Excel for Mac, but how?

Hi,

I cannot find a solution to the problem of not being able to set multiple print areas in my worksheet to print as pages in a PDF format. I don't see the 'add to print area' like explained in this article (https://support.office.com/en-us/article/Set-or-clear-a-print-area-on-a-worksheet-27048af8-a321-416d-ba1b-e99ae2182a7e) on my Mac version of Excel (version 15.36 - 170702).

It does work on the Windows version because a friend forwarded me the result like explained in the above article but I cannot find any info on the issue on the web or at the Office 365 support team.

Thanks for the help,

Olivier