What should I do if I find errors in PDF data?

now a lot of college textbooks are more expensive, if you buy a paper version of the more wasteful, with a semester will not use, put in that also can only be used as waste paper. 　　 So as a university teacher, I encourage students to buy electronic version of textbooks, relatively cheap, but also very environmentally friendly, do not occupy the place. Next semester to teach a new course, this course is in recent years to open, the textbook is not much to reference, we need to organize their own search. It took me a lot of effort to find a matching textbook on the internet, which is really not easy. Hurriedly to download this PDF textbook, next semester will be sent to the students as a course reference is very good. But when I read the textbook carefully, I found that there are several professional errors, if the teaching materials directly to the students that will certainly mislead the students.

The teaching materials issued to the students how can be wrong, holding a rigorous and serious attitude, I decided to first correct the errors in the teaching materials so that the students I am assured. But I am puzzled again, how to modify the PDF document, the past has not encountered such a situation, a time really do not know how to do it well. Fortunately, now the network is developed, I will search the Internet to see if there is any harvest, a search only to know that the original can edit the PDF document software has already appeared, but I do not pay much attention to this aspect only. See many people on the Internet recommended the speed of the PDF editor, I also went to download a look at the effect is good.

Open the Agile PDF Editor and discover the features of the interface at a glance. Open the PDF document that you need to edit, and find that the page of the Agile PDF Editor is very similar to the PPT, so will the editing method be the same? So I try to edit the PPT method to try to edit the PDF document, found that the line is really good. Select the page you want to modify. Click the text that needs to be modified, delete the wrong text message in the text box, add the content of the fight, and finally click Save to complete, very simple.

Finally, with the help of the Agile PDF Editor, I corrected the errors in the contents of the PDF textbook so that it would be a lot easier for the students to use when they started school.

What should I do if I find errors in PDF data?