Is there a difference between handwritten scanning into pdf and editing pdf directly?

First, there is no difference in format/root

PDF was created to keep the format uniform and difficult to modify. pdf editor freeSee this article for details.

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However, apart from the above two aspects, everything else is problematic

First of all, why should PDF have a unified function to maintain the format?

You work on formatting your text/slides and naturally want others to see it the same way you see it

How to adjust line spacing and set paragraph width, such as word... .

Also, can you write in print? Do not rule out some students calligraphy education for everyone, but this is a minority after all

All in all, handwritten PDFS are not pretty and are poor to read, either in the format or the font itself

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Second, handwritten PDF scanning is a problem

The scanned pdf file contains pictures, while the document pdf file is composed of graphics, tables and characters. The latter can be copied and used in other text editors (or PDF editors), while the former requires OCR recognition to use characters.

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zhuanlan.zhihu.com/p/136653793

In terms of file size, the previous file is larger, possibly because of the impact of scanning resolution, it is not clear. The text and table behind are vector format, can be infinitely enlarged without distortion, printing effect is good.

Finally, many people like PDF conversion

Handwritten scanned PDFS are almost impossible to convert into word text.

Many PDF conversion system software design is to see the source PDF quality, not so cow converter can turn out anything

At best, some of them have more features than others