First, the use of selection tools
The selection tools in Photoshop include a mask tool (Marquee), a lasso tool (Lasso), a magic wand (Magic Wand), a font mask (Type Mask), and a selection that is converted by a path, including settings for different feather values. Using these tools to edit in a channel is the same as the operation of an image, all you need is a little courage.
Use the selection tool to do some of the most basic things, but if you want my exact example, it's also a bit difficult, because I really can't remember what part of my recent work was simply using the selection tool to edit the channel. Perhaps it's time to make a slight change to a constituency that has already been created by other means? This is a very basic method, and you have to understand it, but you can hardly perceive it.
Ii. use of drawing tools
Drawing tools include airbrush (airbrush), brushes (paintbrush), pencils (Pencil), stamps (Stamp), Eraser (Eraser), gradients (gradient), paint drums (paintbucket), blur sharpening, and smearing (Blur, Sharpen, smudge), deepen dodge and sponge (Dodge, Burn, sponge).
It should be easy to understand the color problems of the channels we normally operate on. When you see the white of any choice, there should be an urge to smear it with your finger.
Of course the consequences of doing this may only change the color of your beloved display screen, but you can use a brush this kind of tool as a substitute to experiment, believe that the first time the consequences of doing this is exciting (if you say no, then you assure me that you use the color of painting is not the same as the color of your smear position).
It is true that any area of choice you can create with a drawing tool that you can pick up with, the only difference may be that you don't see the lines that are moving in black and white.
One of the advantages of editing a channel with a drawing tool is that you can control the Strokes accurately (although not as much as the drawing board) so that you can get softer and more complex edges. Actually use them, and you'll soon like them. Now I do every picture, as long as the channel, 80% or more from the brush started. Because I do not need a black or a group of white.
To mention here is the gradient tool. Because this kind of tool is more special. Not that it is particularly complicated, but that it is particularly susceptible to neglect. But it is particularly useful relative to the channel. It's what I know. In the strict sense of Photoshop, a painting tool that can paint multiple colors and contain smoothing over the edges is a smooth and delicate gradient for the channel. I think it's a good idea to start from here when you want to integrate yourself perfectly into nature.
Third, the use of filters
Someone once asked me how to be a good art work. I told him that it was the perfect combination of natural factors and human creations. In essence, I have been thinking about this issue all along.
Like most people, I firmly believe that human creativity and imagination are unlimited, but I also know that it does not mean that one can imagine everything. Sometimes it's a pretty interesting way to isolate yourself and let Photoshop do the writing.
Filter operations in the channel, usually in the case of different grayscale, and the reason for the use of filters, usually because we deliberately pursue an unexpected effect or just to control the edge.
In principle, you can use any filter in the channel to experiment, of course, this is only when you do not have any purpose, in fact, most people in the use of filters to operate the channel usually have a clearer desire, such as sharpening or virtual edge, so as to create a more suitable constituency. Various situations are more complex, need to be treated according to the different purposes, but you can try, there will always be a harvest.
Iv. Use of adjustment tools
Particularly useful adjustment tools include levels and curves (curves).
When you use these tools to adjust the image, you will see a dialog box with a channel menu, where you can edit the color channel. When you select the channel you want to adjust, hold down the SHIFT key, click another channel, and finally open the composite channel in the image. So you can force these tools to work on one channel at the same time.
This is certainly useful for the editing channel, but it's not often used, because you can build a tuning layer without destroying the original information, but if you don't understand what the channel is, you should know it now. In the final analysis, the understanding of the passage is only a feeling problem, perhaps an epiphany for a moment.
Again, a simple channel operation is unlikely to produce any effect on the image itself, must be combined with other tools, such as selections and masks (where the mask is most important), so it's best to connect to these tools when you understand the channel to know what your elaborate channel can do with the image.