What is the difference between opacity and padding in PS?

A friend asked, what is the difference between padding and opacity, and when should you use the opacity? When should I use padding? Today @p big dot s Micro Bo to the students in a popular way to understand the difference between the two, the case vivid image, it is worth reading.

Both padding and opacity are an option for the layer, which is positioned at the Layers Panel option.

"Opacity" (Opacity), which is well understood, is the transparency of the layer. What do you mean, fill fill? Let's look at a picture first.

It seems that there is no difference between opacity and padding. But in fact, there is a difference. Let's look at a picture, and I'll add a 3-pixel black stroke layer style to the asked logo.

As we can see, when the opacity and padding are not adjusted, the two display results are the same, and then we modify the opacity and fill to 50%, and the effect is as follows:

Now, we can see that there is a significant difference in effect, where is the difference? believe that not anomalous Trichromatism's friend, will be able to see that the blue part is the same, the difference lies in the black part. What is this black part? The stroke layer style that we just added.

After you adjust the opacity, the layer's layer style, whose color follows the opacity of the layer, adjusts the fill to change only the layer itself, and the layer style is unaffected.

So, we can draw a conclusion that the opacity of the adjustment relative to the entire layer, including the layer style, are within the adjustment range, the opacity is set to 50%, the layer's logo body includes its own layer style, all become 50%, and fill it, The layer style is unaffected by the only change in the transparency of the layer itself.

All, the difference is that opacity is for the entire layer (including the layer style), and the padding is for the layer itself.

So, the question is, when to use opacity, when to use the fill, how to grasp?

For example, I add a watermark to a picture.

Like this, we use opacity or padding? The answer is: whatever! Because, we just added a logo, did not apply any of the layer style, adjust the opacity and fill, the effect is consistent, no any difference, so, any use whichever is OK.

So when do you use padding? Of course, when you have a layer style, you don't want the layer object to show itself.

　　There are probably several common types of the following:

1. Text effects

Use several different layer styles to overlay the effect and enrich the effect.

2, Icon icons

Use different layer styles to add details, and to reinforce projections and the like.

3, mock-up template

Use multiple layer styles to enrich the effect and create smart templates.

More commonly used is probably these kinds of, the principle is the same, the use of filling for 0 o'clock, layer style unaffected by the characteristics of several layers of different layers of overlay, creating a rich effect.

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