Portable Document Format or PDF is a universal file format that preserves the fonts, images, graphics, and layout of any source document, regardless of the computer or software used to create it. The advent of PDFs by Adobe Systems in 1993 revolutionized the way we share, store, and interact with digital documents. However, the limit on editing capabilities of these files have been a pertinent issue since their inception. This is where a PDF editor comes into play.

A PDF editor is software designed to modify Portable Document Format (PDF) files. These editors are equipped with a variety of tools and functions that enable users to interact with PDF documents in ways that would otherwise be impossible.

For instance, one of the most basic uses of a PDF editor is to allow simple text edits, offering unreserved control over text changes in your PDF without the original document at hand. This includes the ability to add, delete, or adjust the location of paragraphs, change the font type, size, and color, etc.

A PDF editor also offers the ability to extract, rotate, and delete pages. Say you have a large PDF file and need only a part of its content; instead of having to keep the whole file, you can extract the necessary pages or delete the unwanted ones. Similarly, if some pages are in the wrong orientation, you can conveniently rotate them to the correct angle.

The integration of Optical Character Recognition (OCR) technology in PDF editors allows conversion of scanned documents into searchable and editable text. This eases operations like locating specific information within a large document or editing scanned contracts.

Another crucial feature is the ability to insert, update, or remove hyperlinks. When publishing a document online, hyperlinks help to direct readers to useful resources or cite references, thus enabling a more immersive reading experience.

PDF editors also possess annotation tools for marking up documents. You can use these tools to highlight text, add sticky notes, draw shapes or freehand notes, etc., allowing others to understand your input on the document better.

Adding to the above, you can also use PDF editors to fill out and sign forms digitally, password protect your sensitive documents, or compress your large PDF files to easier-to-handle sizes.

In conclusion, a PDF editor is an indispensable tool in our digitalized world, with its endless functions catering to a vast spectrum of needs. It simplifies the way we handle documents, boosting productivity and efficiency, whether for personal use or business relationships. By providing the ability to revise, annotate, and share PDFs effortlessly, it truly holds the potential to reshape your document management. Who would've thought that a task as simple as editing a PDF could be so influential?