More tables on page

Hi

I just installed print-o-matic for one reason only, to be able to print tables from my site. Since tablepress no longer offers a print possibility in its free version.
Print-o-matic ‘target=table’ works beautifully when there is only one table on a page. In case of more tables on a page, I would like to know how to exclude a table from print, or target a specific table. I tried every shortcode: no print, class, id – and none of them works. So I must be doing something wrong – can you help me?

Regards

Rita