Markup, within the context of digital paperwork, refers back to the act of annotating or including notes. A PDF brief for Moveable Doc Format is a generally used file sort that preserves formatting and structure throughout completely different gadgets. If you mark up a PDF, you are basically including your individual annotations that will help you perceive or share the doc.
As an example, you may spotlight necessary sections, add sticky notes to report your ideas, or draw shapes to emphasise sure areas. These markups could make it simpler to collaborate with colleagues, retain info, and rapidly find particular sections while you revisit the doc.