PDF file format is different! First of all, it was designed for professional grade printing. That is why it is mostly “read-only” format and internally it looks more like an application than just a set of images. PDF works great for. viewing and printing exacly the same version that was created initially because PDF format can retain exactly the same representation of documents on all desktop and mobile platforms. documents with lot of graphics that were intended to be viewed or printed in super high quality. Yes, it is possible to have a picture of the whole document that will take around 500 mb or even more but as pdf firmat uses vectors, searchable text, fonts as separate objects and may require just 100 kbytes with the same high quality printing. saving original pictures (for example, scans of documents, newspapers etc) with transparent overlay with text. It is very convenient for long term archiving because it makes possible to search text and in the same time see the original picture. engineering documentation. pdf format allows to put lot of complex vector graphics inside along with 3D objects, video and audio. long term archiving of documents. pdf files can work in “portfolio” mode where single pdf file contains hundreds of attachments interactive forms because PDF can have input fields defined and can even send your data to remote server. It is very convenient and much faster to fill such a form comparing to filling a paper versions of forms, scan it, then have someone to manually re-enter data from picture. presentations. with PDF file you can be sure that it will looks exactly the same way when you are showing this presentation from another computer. PDF is not working great for. just photos or pictures. In this case PDF acts just like a container for picture files. editable and constantly updated documents. Yes, there are some pdf editors available but PDF is not designed for lot of editing like Word or Google Docs format. as a way to transfer videos or audio files.
Yes, there are some players available that can handle such files, but PDF is not optimized for it. I think that only some video file types really works well with PDF. In fact, it probably works even worse than PDF because there can not be much difference in the way they render. With image files. Yes, it is possible to open such images by using Adobe Reader with Acrobat Reader. Pressing Ctrl+Z twice, and then choosing Adobe Draw from the list on the left makes Adobe Draw to open a PDF file.