PDF: when fixed layout beats editable formats

PDF is the right choice when you want the document to look exactly the same on any device or printer, and you do not want the recipient to change the text, images, or formatting. Think of a formal report, a contract, or a brochure: you control the layout, fonts, and page breaks. The key contrast is with Word or Google Docs, where the reader can edit freely and the layout may reflow. If the task is to preserve a design or ensure consistent pagination, PDF wins. If the task is to collaborate or revise, pick an editable format instead.

A common trick in exam questions is to offer a scanned image of a document as a PDF. That is not a true PDF for text: it is a picture, so you cannot search, copy, or select words. Always check whether the PDF is text-based or image-only. Another hint: if the question mentions accessibility or screen readers, you need a searchable PDF, not a scan. To decide fast, ask yourself: does the recipient need to edit? If yes, avoid PDF. Does the recipient need to read or print with exact formatting? If yes, PDF is your friend.

To lock this in, remember the two-word test: 'edit or print?' If the answer is print, pick PDF. If the answer is edit, pick a word processor. Also, if you see a PDF in an exam scenario, immediately check whether it is searchable text or a scanned image — that distinction often decides the correct answer.