CAJ file is a file format similar to PDF file, which is used by many e-books and documents on the network for users to browse. When browsing CAJ format files, you must use the corresponding browser, and the common browser is CAJViewer.

PDF is the abbreviation of portable document format, which means "portable document format". It is a file format developed by Adobe Systems for file exchange, which has nothing to do with applications, operating systems and hardware.

What if the CAJ file cannot copy the text?

1. For the original text that can be copied, pay attention to the correct usage: click the beginning of the text to be copied when the mouse arrow is left, and click the end of the text to be copied when it is right, otherwise it will not be copied to the desired text.

2. If the whole original text is in picture format, you can't choose to copy the text, you can only copy it into a picture.

Refer to the above? China HowNet-Help Center? Baidu encyclopedia -Caj-cd specification? Baidu encyclopedia -pdf