It is not a picture, it is a file in an independent format, but the file in this format looks like one picture after another when opened.

PDF (Portable Document Format) originally means "portable document format". This is a file format that everyone is familiar with. Professionals regard it as a necessary file format. The various PDF conversion/generation/annotation tools currently on the market reflect the popularity of PDF from one aspect.

Advantages of PDF format files:

1. Can be opened across devices/systems

At the beginning of the birth of PDF files, the use of PDFs had to rely on Adobe itself specialized software. Today, PDF is an international standard and is the default format that can be directly opened and browsed by almost all mainstream operating systems. And almost all of them can be opened directly on desktop computers/tablets/mobile phones.

It can be said that PDF is no longer the private property of Adobe, but an office document standard that is actually accepted by the general public around the world.

2. Ensure the consistency of document content presentation

As you can see from the origin, the PDF format comes from Adobe, and Adobe started with desktop printing, typesetting design, and image processing. PDF The files are based on Adobe technology and are print-friendly. In other words, the fonts/colors/images of the original can be reproduced on different devices.

And we know that if some office documents (I won’t name them) are changed to a different device, the printing/display effect will be completely different due to the different fonts that come with the device. PDF has been aware of this since the beginning of its design, and it was beyond the level of its birth. Even today, it is a very practical and considerate consideration.

3. Supports a variety of "external and external plug-ins"

From its birth in the 1990s to today, various expandable/integrable functions and functions have been produced around the PDF file format. plan. ?

For example: multimedia integration/highlight annotation/note review/handwritten signature/form collection/print to PDF/content encryption/digital signature/distribution restrictions.

These characteristics make PDF almost the only standard in the field of commercial document circulation (especially overseas), whether it is issuing a briefing/requesting a quotation/scanning a receipt/opening certificate, or signing a resolution , it may be PDF files operating or circulating behind the scenes.