Adjusting layer opacity –
- Select the desired layer, then click the Opacity drop-down arrow at the top of the Layers panel.
- Click and drag the slider to adjust the opacity. You’ll see the layer opacity change in the document window as you move the slider. If you set the opacity to 0%, the layer will become completely transparent, or invisible.
How do you change the opacity of a color?
How to make a box semi-transparent – Learn web development | MDN This guide will help you to understand the ways to make a box semi-transparent using CSS. If you would like the box and all of the contents of the box to change opacity, then the CSS property is the tool to reach for.
- Opacity is the opposite of transparency; therefore opacity: 1 is fully opaque—you will not see through the box at all.
- Using a value of 0 would make the box completely transparent, and values between the two will change the opacity, with higher values giving less transparency.
- In many cases you will only want to make the background color itself partly transparent, keeping the text and other elements fully opaque.
To achieve this, use a color value which has an alpha channel—such as, As with opacity, a value of 1 for the alpha channel value makes the color fully opaque. Therefore background-color: rgba(0,0,0,.5); will set the background color to 50% opacity. Try changing the opacity and alpha channel values in the below examples to see more or less of the background image behind the box.
How do I remove fill in Photoshop?
How to Make Manual Selections to Use the Delete and Fill Selection Tool – Once you learn how to use the Object Finder to make selections, you may find that sometimes it’s easier just to use any of Photoshop’s selection tools, including the Lasso tool, which will allow you to make a custom selection by simply drawing it with the mouse. 
Keep in mind that if you use the Lasso tool (or any of the other selection tools), and create a selection that includes extra pixels other than your intended object, that these pixels too will be deleted and filled in with new pixels once you engage the Delete and Fill Selection tool. 
This is technically two clicks, but it works every time if Shift + Backspace isn’t working for you.
What is transparency in Photoshop?
About opacity and blending options in layers – A layer’s opacity determines the degree to which it obscures or reveals the layer beneath it. A layer with 1% opacity is nearly transparent, while a layer with 100% opacity is opaque. Transparent areas remain transparent regardless of the opacity setting.
- You use layer blending modes to determine how a layer blends with the pixels in layers beneath it.
- Using blending modes, you can create various special effects.
- A layer’s opacity and blending mode interact with the opacity and blending mode of painting tools.
- For example, a layer uses Dissolve mode at 50% opacity.
You paint on this layer with the Paintbrush tool set to Normal mode at 100% opacity. The paint appears in Dissolve mode at 50% opacity. Similarly, if a layer uses Normal mode at 100% opacity, and you use the Eraser tool at 50% opacity, only 50% of the paint disappears from the layer as you erase. 
Blending layers A. Bamboo layer and Borders layer B. Bamboo layer with 100% opacity and Color Burn mode C. Bamboo layer with 50% opacity and Color Burn mode
What type of color is transparent?
This question comes from Stella, who was at my West Dean course in September: What exactly is the difference between transparent and opaque paints and how does it affect my paintings? The answer is that transparent paints let the light through to the underlying paper while the opaque paints reflect the light, effectively blocking it and stopping it from reaching the paper.
- The effect is that transparent paints have a more glowing, three-dimensional finish thanks to the resulting layering, while the opaque paints have a flatter, matt appearance.
- Some media such as gouache, chalks and pastels will always be opaque, because the medium itself is opaque.
- Other media such as watercolours, oils and acrylics are transparent, so the transparency/opacity of the paint will depend on another factor, which is the pigment used in each colour.
When it comes to transparency, there are 4 categories of pigments:
Transparent, which let all the light through Semi-transparent, which let most of the light through but reflect a small part Semi-opaque, which reflect most of the light but let a small amount through Opaque, which reflect all the light and let nothing through
Here are some examples of what this means in practice. 
Case A – A single wash of transparent blue over white paper The light goes through the paint, bounces off the paper and comes back through the layer of paint. The eye sees the blue colour, with a bright finish thanks to the brightness of the white paper underneath. 
Case B – A single wash of opaque red covers the paper The light bounces off the paint without allowing it to travel through to the white paper. The eye sees the red colour, with a flatter finish because of the lack of depth. 
Case C – Three layers of transparent paint over white paper The light travels through all the layers, bounces off the white paper and comes back through all the layers. The eye sees all the colours at once, with a lot of depth created by the layering. 
Case D – One opaque wash of green between two layers of transparent colours The light goes through the yellow layer to the green opaque layer but cannot go any further. The eye will see the green through the yellow, giving a yellowy green colour with some depth, but the grey layer and the white paper will disappear entirely, limiting that depth and annihilating the white paper-given glow.
- Now it’s up to you to play with all the above, combining your pigments to reach your desired effects.
- Remember that this will only work in a transparent medium.
- If the medium is opaque, only the top layer will be visible no matter what pigments are used.
- Examples of transparent colours: all the Quinacridones and Phthalo colours, Permanent Rose, Gamboge and Indian Yellows, Perylenes and most blacks.
Examples of opaque colours: all the Cadmiums, Cerulean Blue, Naples Yellow and all whites. Lemon Yellow and Sap Green are the troublemakers. Depending on the brand, some are transparent and some are opaque. I will write about them in the Pigment Spotlight section in different posts.
I made a video about transparency/opacity and why transparent pigments can turn into opaque paints. To see the video on my free YouTube channel, please click here, If you want to find more tutorials, art questions and videos, please click here to go to my Patreon subscription site, It is full of exclusive contents.
Keep the questions coming; I will answer them, whether directly or with a blog post or video. Happy painting!