Core Graphics provides default image filters for quick special effects. Here’s how to save image files in Preview for macOS with effects.
Use Quartz image filters in macOS’s Preview app to apply special effects to images.
Apple’s Core Graphics (Quartz) 2D imaging subsystem provides a high-performance, consistent API for creating, saving, and manipulating graphics. It’s also responsible for drawing most text on Apple platforms (Core Text).
Text can be drawn by Quartz using subpixel precision, and anti-aliasing (smoothing) even if a particular display can’t show the text at full computed resolution.
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Source: AppleInsider News
