It is assumed that beginning students of Adobe Photoshop have had experience with painting and drawing programs. Painting programs are pixel-based. Drawing programs are object-oriented.
Some programs incorporate both painting and drawing modes.
This is true of text as well as any other part of a Photoshop image. Photoshop can resize, rotate, alter the contrast, brightness, color hue or saturation, or otherwise transform user-selected portions of an image. The ability to select portions of an image is one of the most important skills in using Photoshop. The edges of areas in pixel-based images appear jagged unless they are gradually faded, blurred, or blended with the surrounding image. Anti-aliasing softens edges by partially filling edge pixels, thus no detail is lost .