How to make pdf files smaller?

The method of reducing the pdf file is as follows:

Computer: Lenovo Xiao Xin air 14.

System: Windows 10

1. First, determine the PDF file that needs to be reduced. The original file is 226MB, and the system needs to be less than 10MB. This file is only for reference, so the picture pixels in the file can be reduced to meet the conditions of uploading system.

2. First, open the PDF software, open the PDF file to be modified, find the "Advanced" title, select "PDF Optimizer" and click "Open" to display the drawing frame as shown in figure 1. Then find "compressed JPEG" in two places, click on the black inverted triangle next to the quality, and you can choose from the lowest to the highest according to your own needs. I choose the picture with the lowest quality, and then confirm.

3. After confirmation, save the PDF file with another name.

4. Wait for the file to be processed and saved. If the original file is too large, the processing time may take two or three minutes. Wait slowly.

5. Finally, the file size becomes smaller, which is 100 times smaller than the original file.

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