Hiding the marks can be done easily and can be undone just as quickly. You can even change the color of the different editing marks and the notes. This free program includes movable text boxes for notes as well as highlighting, underscoring and strike-through functions. Skim For Mac allows for a variety of marking and annotations to be inserted into PDF files. However, Skim For Mac might be able to solve your dilemma, as it allows users to place marks and notes into PDF files and save all of those adjustments separately as well. Finding one that can collate all of the changes as well seems almost impossible. Finding a low-cost program that can edit or add notes to a PDF file can be hard.
