There are many PDF editors in the market to let you type in a PDF file. When it comes to typing in a PDF, you can try Wondershare PDFelement. Its editing feature outshines the competitors. You can open your PDF with this program and click Edit Text button user the Edit tab. Then you can start typing text in your document.With PDFelement, you can easily insert, delete, modify text in standard and scanned PDFs. Text you typed in will naturally flow into adjacent lines with consistent font formatting and line spacing. The most important thing is that the original layout and formatting of your PDF will well kept and nothing will be messed up.You can get a full guide here：PDF Editing Re-Imagined