How to save the modified PDF map

I opened a PDF map, use the input tool, enter the text somewhere, modification is successful, save as, the new trace file has not been modified.I ask how to save a new file.

Using ADOBE ACROBAT (non- reader) or FOXIT PDF EDITOR can modify and save.with one of the two software, such as the FOXIT PDF EDITOR, for example, to open PDF, enter text and click “Save”, that covered the original PDF file.You can also choose another Save as you enter the file name can be confirmed after the point.

using Adobe Acrobat Professional, the latest version of the current version is actually very easy to use 9.3,7.0,8.0.