Because PDF file can be made from Word does not mean that it should not follow rules of other downloadable files or web pages.
Naanị n'ihi na PDF nwere ike ịme ihe ọ bụla edere ederede apụtaghị na ọ gaghị agbaso otu iwu nke ibe weebụ ọ bụla ma ọ bụ faịlụ a na-ebudata.