Computers display graphics in either vector or bitmap format. Flash also imports and manipulates vector and bitmap graphics that were created in other applications.

           Vector graphics describe images by using lines and curves, called vectors, that also include color and position properties.
           For example, the image of a leaf is described by points through which lines pass, creating the leaf’s outline. The color of the leaf is determined by the color of the outline and the color of the area enclosed by the outline.

            When edit a vector graphic, modify the properties of the lines and curves that describe its shape. Vector graphics are resolution independent; that is, they can be displayed on output devices of varying resolutions without losing any quality.

           Bitmap graphics describe images using colored dots, called pixels, arranged in a grid.
            For example, the image of a leaf is described by the specific location and color value of each pixel in the grid, creating an image in much the same manner as a mosaic.

            When edit a bitmap graphic, modify pixels rather than lines and curves. Bitmap graphics are resolution dependent, because the data describing the image is fixed to a grid of a particular size. Editing a bitmap graphic can change the quality of its appearance.

           The primary drawing tools can be divided into two groups: geometric shapes and freehand lines and strokes. Line, Oval, Rectangle, and PolyStar fall into the first category; Pencil, Brush, and Eraser fall into the second.