Infix PDF Editor Made Simple. For the first time it is now possible to edit text in any PDF document using tools familiar to anyone who uses a word processor. Easily edit the text in your PDFs, reflow and re-justify text, change fonts, colours and sizes. Resize, reposition and change images as you would in a professional publishing application. Infix PDF Editor is a tool that allows you edit PDF and text documents.To ensure your edited documents look their best, Infix includes the kind of professional-quality hyphenation and justification (H and J) found in packages such as Adobe InDesign and Quark Express.