Version: 0.10.5 (using KDE 4.4.5) OS: Linux Sometimes I have to print out PDF files and blacken or blank out (German: schwärzen) some information. I've seen the authoring tool to highlight something. I need the same thing, just not yello, but plain black... Adobe Acrobat (not the reader) can do this and it is a great feature. Not often used, but valuable when needed. Reproducible: Didn't try