Tools/materials: Lenovo E480, windows 10, WPS 12.0.

1. First, open the PDF file we need to compress.

2. Then, find the file option in the menu bar, click the file with the left mouse button, and then select the function key to reduce the PDF size.

3. Then in the pop-up Jinshan PDF compression panel, click the compression degree and select the mass customization function.

4. Finally, according to the requirements, adjust the picture pixels in the pop-up custom picture resolution panel, and then click Start Compression.