This document shows you how to use Adobe Acrobat Reader to indicate Pre-fill, Post-fill, Required, and Signature fields. For a visual example, please reference the “Direct Deposit (Clean)” and “Direct Deposit (Mark Up)” PDFs attached to your HRCenter email.
In Adobe Acrobat Reader, you can highlight text and choose a color, or use Draw Tools to make a rectangle. These items are accessible under the Comments toolbar. See screenshots below.