Every image which we open in Photoshop is having separated channel that can be viewed through Channel Panel. It depend of the image mode, RGB will give us 3 channels while CMYK give us 4 channels. Actually we can break up channels into many separated images. Each of the channels will be one image file. Here is Photoshop tutorial to do it.
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When we work with some layers and we want to align them, Photoshop has aligning icons which we can use easily. These icons were available in previous Photoshop version, but it gets simpler to use in Photoshop CS4 and CS5. If we need to align those layers, first we have to select them simultaneously. To select lot of layers, we can use Shift and Ctrl key combination while clicking the layer’s name. You can also use Move tool with the “Auto select: Group” selected in option bar.
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Unlocking Photoshop layer is one of mostly done in some tutorial. Actually I have written it in some previously tutorial, but here I am writing it again so I can easily link to this post if I need to. By default, jpg image is having single background layer, this background layer is locked and it cannot be applied with some Photoshop steps.
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Photoshop CS4, and also other version, has eraser tool set in the tool box. These tools are Eraser Tool, Background Eraser Tool, and Magic Eraser Tool. All of them are has single function, that is to erase part of image. But each of them has different abilities. Here is a quick tutorial on how to use them.
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There are two type of selection tools in Photoshop CS4 which can be use to make a quick selection, especially for images/photos that has similar color. Those tools are Magic Wand tool and Quick Selection tool. Magic wand is available since earlier Photoshop version, while the Quick Selection tool is available in later Photoshop version as complement to its predecessor.
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