lợi thế là bạn có thể làm một số hoạt động khác nhau trong khi lựa chọn một là nhấn mạnh rằng bạn không thể làm trong khi cây trồng được đánh dấu. Bạn không có thu hoạch cùng các tùy chọn có sẵn khi thu hoạch bằng cách sử dụng một lựa chọn. Ngoài ra, ngay cả khi lựa chọn không phải là hình chữ nhật, cây trồng này. Thông thường, các công cụ Crop là lựa chọn tốt nhất khi bạn đang có kế hoạch để cắt một diện tích của hình ảnh. | Part I Getting Started with Adobe Photoshop CS5 advantage is that you can do several different operations while a selection is highlighted that you cannot do while a crop is highlighted. You do not have the same cropping options available when cropping using a selection. Also even though the selection is not rectangular the crop is. Typically the Crop tool is the best option when you are planning to crop an area of an image. The ability to crop around a selection provides an alternative option for times when you already have an area selected that fits the area that you would like to crop. Straightening an image One of the most common editing tasks when working with images is straightening. Photos taken when the camera was slightly angled or even on its side do not look quite right. Photoshop provides several different methods to straighten images that are slightly off. Photoshop provides three basic methods for straightening images. One is to simply rotate the image by a specific angle another is to rotate the image while you are cropping it and another is to use the Crop and Straightening utility to batch straighten scanned photos. Rotating and flipping images The easiest way to rotate an image in Photoshop is to select Image C Image Rotation and then select one of the following options from the pop-up menu shown in Figure 180 degrees Rotates the image around the center axis 180 degrees. 90 degrees CW Rotates the image around the center axis 90 degrees clockwise. 90 degrees CCW Rotates the image around the center axis 90 degrees counter-clockwise. Arbitrary Launches the Rotate Canvas dialog box that allows you to select an angle to rotate the image as well as whether to rotate the image clockwise or counterclockwise. The image size is increased to keep the full original pixels in the rotated version and any new space that must be added is added as the background color. Note When you rotate an image 180 degrees the dimensions and pixels do not change. When you
