How can I fill in questionnaires (PDF files) to answer them? How can I activate the typewriter toolbar?
I depends which PDF reader you are using. For example, it is activated in the new version of Foxit Reader (4.1) whereas in version 3 you needed to upgrade to the "Pro" product.
It depends on what PDF-reading software you're using. Foxit and PDF Xchange Viewer have the typewriter features.