Uses:
An input device consisting of a flat, pressure-sensitive pad which the user draws on or points at with a special stylus, to guide a pointer displayed on the screen. The graphics tablets are used to capture data or hand written signatures it can also be used to trace an image from a piece of paper which is taped or secured to the tablet surface . Capturing data in this way, by tracing or entering the corners of liner poly-lines or shapes, its called digitizer. Graphics tablets are normally used by graphic designers to create their work; it can also be used by photographers to edit photos.
Advantages:
It’s portable which means it can be used in different places because it can be carried around in a bag; the weight is light in comparison to a laptop. Using a graphics tablet allows the person using it to create much more accurate drawing instead of using a mouse to create an image.
Disadvantages:
Not suitable for clicking and selecting menus, it is also much more expensive than a mouse. It can only be used for editing/creating images.
Alternatives:
A mouse could be alternative devices because it allows you draw an image in a piece of software. A keyboard could also be used because you can enter commands to edit a image.