Software or applications that facilitate the modification of typeface styles within Portable Document Format (PDF) books provide users with enhanced reading experiences. For example, an individual with visual impairments might use such a tool to increase font size or switch to a more legible typeface, thereby improving readability.
The ability to alter typography in digital books is crucial for accessibility and personalization. It empowers readers to customize the presentation of text to suit their individual needs and preferences. Historically, PDF documents were often considered static in terms of formatting; however, advancements in technology have enabled greater flexibility in modifying these documents, including typeface adjustments.