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Enhancing CAD Drawings with Photoshop phần 2

Bấm 0 để thay đổi độ mờ đục của lớp hiện tại đến 100%. Chú ý kiểm soát độ mờ đục Điền dưới sự kiểm soát Opacity tiêu chuẩn. Điền vào hoạt động giống như Opacity cho các điểm ảnh trên lớp. Tuy nhiên, Fill không ảnh hưởng đến độ mờ của hiệu ứng layer (Layer Styles "sau này trong phần này). | 22 chapter 1 the basics Notice that the clouds got lighter because the pixels on the layer are now more transparent. 7. Press 7 on the keyboard. This is a shortcut that changes the opacity of this layer to 70 . The clouds are a bit more opaque now. TIP Press 0 to change the current layer s opacity to 100 . Notice the Fill opacity control below the standard Opacity control. Fill works much like Opacity for pixels on the layer. However Fill does not affect the opacity of layer effects see Layer Styles later in this section . 8. Three lock options are available for each layer Local Transparency Lock Image and Lock Position. Four buttons are to the right of the word Lock on the Layers palette. Click the Lock All button to display the padlock icon after the layer name. liock Ỷ The Lock Transparency button locks the transparent pixels meaning you won t be able to add pixels to the already transparent areas of this layer. The Lock Image button locks the image pixels the opposite of transparent pixels so you can t alter the existing pixels however you can still add more pixels in transparent areas of the layer. The Lock Position button locks the layer so it can t move. Finally the Lock All button applies all three locks together. 9. Close the file without saving. NOTE Layer locks are provided only as a convenience for you so you don t inadvertently alter a layer you want to preserve. Be aware that layer locks don t provide security as they can easily be unlocked at any time in the Layers palette. Layer and Vector Masks Masks are used to selectively block out portions of a layer. Unlike visibility which controls whether an entire layer is on or off or opacity which affects an entire layer in a gradual or partial way masks can be used to selectively hide or display portions of a layer without changing other areas. There are two types of masks in Photoshop layer and vector. Layer masks are made of pixels and vector masks are made of paths. Both are separate entities that are