Front-projection interactive whiteboards have a movie projector in front of the whiteboard. A downside of front-projection whiteboards is that the presenter, standing in front of the display, need to lengthen her or his arm with or without a stylus to prevent casting a shadow. : One particular person can make https://yealinkmeetingboard6523456.therainblog.com/33043714/the-5-second-trick-for-interactive-whiteboard