Over a million dollars of equipment is being installed in the courthouse in Jefferson Parish (near New Orleans). Video monitors coming to Gretna courtrooms - NOLA.com, May 25, 2009. I hadn't heard of "annotation monitors":
Each courtroom will have five monitors, including annotation monitors, which, for instance, will allow a witness to use a finger to mark on a photograph appearing on a monitor where he stood when he saw a crime. After the jury sees it, that image can be printed out by a clerk and filed into the case record, Murphy said.
Judges, through annotation monitors that have touch-screen controls, decide what is published for the jury and when.