Adobe

[scouse1979]

How do I write on a Adobe Acrobat document?

[vehelpfulguy]

Once a file has been converted to an Abobe Acrobat document it cannot be updated, that is one of the main points of them.

I believe there are tools to convert an Adobe Acrobat document into Word and other formats which can be updated, but I have never done it.

Have a search on the web to find a tool that does it.

[Machecoul]

If the adobe document has not been locked you can copy and paste it into Word.

[RogerWilco]

If it's not been locked, you can edit it with Adobe Acrobat Writer (oddly enough...)

[wideboy]

Serif's PagePlus 11 will read and write pdfs (at a fraction of the cost of Adobe Acrobat full version). Also check out the free Open Office.