I've got a few PDFs which were downloaded from the internet for my solar installation, and each time I open them, they open in Acrobat Reader however a Print dialog pops up which is annoying. In fact some of them open the Print dialog twice for some reason. Annoying I know!
Anyhow, using the information already mentioned here, I opened the PDF documents in Notepad ++ and they open as text files, Based on this, I searched for the text "this.print" and found the following:
<<
/Type /Action
/S /JavaScript
/JS (this.print\({bUI:true,bSilent:false,bShrinkToFit:true}\);)
>>
I removed the line:
/JS (this.print\({bUI:true,bSilent:false,bShrinkToFit:true}\);)
And saved the file. The file now opens without the print dialog showing!