I believe that for professionals, presentation documents such as ppt are very familiar, and even most people have made ppt by themselves. When some business teams in the company need to demonstrate products to customers, and employees need to make year-end summaries at the end of the y

We usually use PPT when we show some content or teach, but sometimes there is some important information in PPT. In order to prevent this information from being artificially tampered with, we need to convert it into pdf format, like this The format cannot be modified at will, but many