What does the term pixel mean with regard to the dimension of picture ?
Pixel is the smallest element of the image displayed on a computer screen, consisting of a simple dot which may be illuminated or dark. The number of pixels is related to the screen area. For example, if your screen area is set to 800 by 600 pixels, the width of the screen is 800 pixels. To create a picture with the width of no more than 300 pixels means that the width of the picture is no larger than 3/8 of the screen width. Likewise you can use the same measurement for the height.
