I met a PDF file with a placeholder for a logo. When I click this placeholder, it is asking to "upload" a logo.
Browse... causes normal open file dialog appear, which is accepting only PDF files as input.
What it can be? Is it a script to upload logo to some web site? Or it is possible to "upload" data into standalone document and have it modified?
Incredible! I have uploaded my logo in PDF format and it looks like it was embedded into document. And document filesize became smaller!
Is this what is called "PDF forms" or what?