I do have a custome module, and i want to select any register that i want, and in the menu where appears Delete, Massive Update and Export, to add a new option that is Print PDF, that actually prints every register that I selected before, I attach a picture in case i didn’t explain correctly.
However, I believe you will have to override the generatePdf.php file at modules/AOS_PDF_Templates/generatePdf.php to accept an array of ids instead of a single record ID.