OpenGL là một nền tảng API (giao diện lập trình ứng dụng), hoặc ngôn ngữ, mà được phát triển bởi Silicon Graphics 2D và 3D cho máy tính ứng dụng đồ họa. Để sử dụng tính năng OpenGL trong Photoshop, chẳng hạn như hoạt hình Zoom (xem Lưu ý trên trang 91), nhỏ con Zoom, flick panning (xem lời khuyên cuối cùng trên trang trước), hoặc các công cụ Rotate View (thảo luận dưới đây), hệ thống của bạn phải | Workspaces 93 When you have multiple documents open say in a 2-Up or 3-Up layout you can save time by scrolling or zooming all of them simultaneously. To scroll or zoom in multiple windows 1. Open two or more documents then on the Arrange Documents menu Q click a 2-Up 3-Up 4-Up 5-Up or 6-Up icon. 2. Do either of the following To scroll or zoom all the open Photoshop document windows hold down Shift while using the Hand or Zoom tool. Check Scroll All Windows on the Options bar before using the Hand tool or check Zoom All Windows on the Options bar before using the Zoom tool. Rotating the canvas view OpenGL is a cross-platform API application programming interface or language that was developed by Silicon Graphics for 2D and 3D computer graphics applications. To use the OpenGL features in Photoshop such as Animated Zoom see the Note on page 91 Scrubby Zoom flick panning see the last tip on the preceding page or the Rotate View tool discussed below your system must contain a video driver or card that provides OpenGL acceleration. To enable OpenGL drawing in Photoshop go to Edit Photoshop Preferences Performance then under GPU Settings check Enable OpenGL Drawing. Relaunch Photoshop. Unlike the Image Image Rotation commands which rotate the image permanently the Rotate View tool tilts the canvas temporarily so you can draw or paint at a particular angle. To rotate the canvas view by using the Rotate View tool 1. Choose the Rotate View tool S. R or hold down R to spring-load the tool. 2. Do either of the following Drag in the image. A On the Options bar enter a Rotation Angle value use the scrubby slider or move the dial. To reset the canvas to the default angle 1. Choose the Rotate View tool R . 2. Click Reset View on the Options bar. A With the Rotate View tool drag to tilt the canvas area temporarily. 94 I Chapter 5 Changing the screen mode The three screen modes control which Photoshop interface features are displayed onscreen. To change the screen mode Press F to .
