Add text to the document by typing with the text tool.
Then, move your cursor to the side or under the text until you see a red dotted line, and click to add more text in line with the first edit.
You can also type text anywhere on the page, and then drag it, using the red dotted line as a guide.
Text box is just one of the many powerful PDF editing features PDFfiller has to offer.
Learn more here: http://www.pdffiller.com/en/functiona...