Markup also lets users highlight and paint over text passages and handwritten notes, and yet it's not quite suitable for concealing sensitive data in documents meant to be shared.
Users should take care if they want to use it. com.
This is because the tool only blacks out of the area opaquely after it's used multiple times, leaving the text underneath legible. Another thing to keep in mind is that this kind of blackening can be removed using image processing programs.
Apple itself advertises the tool only for annotation purposes or digital signatures. – dpa