::For nothing can seem foul to those that win::

5.Critical Photoshop Concepts

• What is "resolution"?
        higher ,more detail.
        Image->Image Size.
• Which file format shoud I use?
        .psd, .raw, .jpg, .gif, .png
• What are "layers" and how do they work?
        layer style,bleding mode,automatic create new layer,link layer,group layer;
• How do I create transparent areas in my images?
        change layer's transparence;
• What is the difference between "Opacity" and "Fill Opacity"?
        Opacity:controls everything of the layer;
        Fill Opacity:only content,not include the layer style;
• What is the difference between "raster" and "vector"?
        raster will be chop when enlarge.
• What are "Blending Modes" and how do I use them?
        Interaction between layers.Experience.
• What are "Actions" and how do I use them?
        a lot of steps run at once.
• How do I record a custom Action?
        create a new set, name it,then begin to record,when it is finished ,click stop.
        you can skip action by not select it,double click the action to modfy .
• What is a "script" and how can I learn more about scripting?
        Similar to action.

6.Making Tough Selections

• What do I use the Magic Wand for?
        select according to color;
• What is Quick Mask mode?
        use brush/eraser paint a selection after enter to the Quick Mask mode.
• How can I preview the results of a "feathered" selection?
        make a selection,enter to the Quick Mask mode,Filter->Blur->Gaussian Blur,and you will see the range of selection.
• How can I make Extract work for me?
        draw a close range,fill the range,you can also use history brush to recove/or duplicate the layer to enhance.
• When should I use the color Range command?
        a color range of selection.
• Can I use Channels to make a selection?
        Yes,value each channels has the best contrast,make a copy,modify the level then to make a selection.
• What if I need to save and reuse a selection?
        Select->save selection(make a channel of that selection)
• What is "difference masking"?
        2 similar photo,make a excellent selection,not often use.(2 layers,bottom without object,above layer with ,change bleeding mode to difference masking,use color range to make selection)

7.Essential Color Correction Techniques

• What is "temperature" and how do I control it?
        the color of light;
        Image ->Adjustment->Curves/Level/Photo Filter to control;
• How do I improve the contrast in my photos?
        Image->Adjustment->Curves;
• How do I eliminate a color cast or tint in a image?
        Image->Adjustment->Curves/Photo Filter ;
• What's the best way to create a grayscale version of my color image?
        Make Channel Mixer for the layer,check the Monochome,slide the Source Channels;