document
Format (Portable Document Format) is an electronic file format developed by Adobe. PDF file format can encapsulate characters, glyphs, formats, colors and graphic images independent of devices and resolutions in one file, and can also contain hyperlinks, sounds and dynamic images. , supporting long files, high integration, safety and reliability.
PDF file format has nothing to do with hardware and operating system platform, and is common in Windows, Linux, Unix and MacOS systems. No matter what kind of printer, PDF will faithfully reproduce every character, color and image of the manuscript. PDF specification also provides encryption function, digital signature, document attachment and metadata needed to realize these functions.
We can often see documents in PDF format from company documents, government documents, product descriptions, e-books, network materials, e-mails, etc. Because PDF format has the texture and reading effect of paper documents, it can reproduce the original appearance of the original content, and the size can be adjusted at will.
Now, you can even view and interact with high-quality 3D content in Acrobat, which was created in a professional 3D modeling program and embedded in a PDF. For example, you can rotate, enlarge/reduce some parts of a 3D model, and play all animations in a PDF, just like previewing in a 3D modeling program.
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The difference between Acrobat and Acrobat Reader: Acrobat and Acrobat
Reader is the official PDF software produced by Adobe. Acrobat needs to be used for a fee, and can create, edit, modify, convert, view and sign PDF files. tumbler
Reader can't edit PDF files, but can only view, print and annotate, but it can be used for free.
After installing Acrobat, a PDF virtual printer will be automatically installed, which can directly print web pages, Word, Excel, Txt and JPG into PDF.
The pre-promotion of PDF was not smooth, and Adobe did not provide free PDF reading software. In addition, the document is so large that it is too advanced for the era of dial-up internet access that no one even wants to use it. With the popularity of PDF, more and more softwares can edit and read PDF files, such as Fuxin PDF, WPS, Yi Jie PDF and PDF.
Factories, even many online PDF editing websites and PDF conversion websites.
Why does Adobe allow so many non-Adobe PDF software? PDF was originally a proprietary format controlled by Adobe, and it was not officially released as an open standard until July 2008 1, and was recognized by the International Organization for Standardization.
Yi o 32000-1:released in 2008. Since then, the control of standards has been transferred to the ISO committee organized by industry experts and volunteers.
In 2008, Adobe was
ISO 32000- 1
Issue a public patent license and grant the patent buyout authorization required for making, using, selling and publishing PDF-compatible applications. 20 17 ISO released on July 28th.
32000-2:20 17(PDF 2.0).ISO 32000-2
Do not regard any proprietary technology as a normative reference document. Under the leadership of Microsoft Office, how did PDF become popular? In the early days, everyone who has used Word documents knows that the same document, opened in Windows and MacOS respectively, may have completely different effects, even if it is changed to a Windows computer, the effect may be different. And at that time, the effect of opening the same web page in different browsers will be different. PDF has no such problem at all, so many people have to save a file in PDF format and send it out at the same time to ensure that the file 100% seen by the other party presents the desired effect.
PDF files are mainly used for viewing, not for editing. PDF can keep the document format and make the document more ornamental. For example, the company's documents, government documents, product manuals, I don't want anyone to modify them at will. This is very difficult for Word to do. PDF can also be embedded in almost all mainstream multimedia formats, and also supports DRM copyright protection, so many publishers will use PDF format to make e-books. Although you can't directly modify the content of a document like a Word document, you can add various comments, highlights, bookmarks and so on.
PDF fairy is to facilitate the spread of documents, and can perfectly express the original style of all documents. As long as there is a PDF reader, any information in the original file can be perfectly presented without any auxiliary equipment, software or plug-ins. PDF also has various security designs. For example, the publisher of a PDF file can digitally sign the file with a security key, so that the file cannot be changed with a digital signature. It is most important for publishers, enterprises and governments not to modify the norms at will. The above personal views are welcome to criticize and correct. Agree with me, please like to go again, thank you! If you like me, please pay attention to me. Thanks again!