How to Insert Text in a PDF in Foxit Reader
You can insert text in a PDF in Foxit Reader with its "Typewriter Tool" feature. If you need to add comments to a PDF or add additional text, you are able to do so. Foxit Reader is a multilingual PDF reader that is free to download and is an alternative to the Adobe PDF reader. It offers a Windows and Linux version. With the Foxit Reader, you can highlight, add drawings and save unfinished PDFs.
Double-click the Foxit Reader PDF icon to open the document. Scroll to the "Comments" toolbar.
Click "Typewriter Tool."
Place the cursor at the location you want to insert text.
Type your text. Press "Enter" to move to a new line.