A blackboard that can be written on with chalk was yesterday. Today, the modern teacher uses whiteboards, also known as whiteboards, which are written on with special board markers, are magnetic and are also suitable for projections. This type of whiteboard can thus be used in a much more functional way than a conventional chalkboard. In addition, their weight is much more comfortable, so it is also easier to install and transport this type of whiteboard. You can often also use the whiteboard as a projection board.
Format: The projected image is output in a format (aspect ratio) specified by the projector. The format is also determined by the resolution of the projector (see also the entry "Resolution"). The screen format is usually selected on the basis of the format of the beamer image. The most common formats are 4:3, 16:9 and 16:10.
