It can also add graphics, filters, text, and animation to videos. Industry standard for retouching due to the vast number of tools, filters, and special effects. Can easily modify common file types (think JPEG, GIF, PNG, TIF etc). Best when editing already existing images or graphics. Raster graphics are based on dots (or pixels) and are easier to modify because you have control over each pixel. Photoshop is Adobe’s raster graphic creation and editing software. Not ideal when creating multipage documents. Modifying existing images is quite difficult. Can place raster or pixel-based images created in photoshop. Graphics can be scaled up or down without loss in resolution. 
The distance between paths is calculated by an algorithm, so if you scale an image up or down, the quality remains the same. Vector graphics, as opposed to raster-based graphics, use paths instead of dots (or pixels) to represent images. Originally created in 1987, Illustrator is Adobe’s vector graphic software.
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