Ознакомьтесь с этими руководствами к Photoshop
Редактируйте фотографии, чтобы создавать новые изображения и графику.
Raster and vector
Understand the differences between raster and vector graphics.
Raster
Raster images (BMP, JPEG, PICT, PNG, PSD, or TIFF) consist of a grid of pixels, as in a digital photograph, and lose detail when scaled.
Vector
Vector images consist of lines, shapes, and other graphic components stored in a format that uses geometric formulas. When scaled, edges remain crisp and sharp.
