Open ps, create a new 10x10cm file with a resolution of 150, as shown in the picture:
Create a new layer , select the Elliptical Marquee Tool, hold down the Shift Alt key to draw a circular selection, as shown in the figure:
Press Ctrl R to display the ruler, and drag out two rulers Line, locate the center of the circle (that is, the intersection of the two ruler lines), as shown in the figure:
Select the gradient tool, and select "Angle Gradient" in the property bar. Just choose the fill color you like, as shown in the picture:
#After setting the properties of the gradient tool, click on the center of the selection and hold down the left mouse button outward. Drag, then release the mouse to fill the selected color. As shown in the picture:
Press Ctrl D to cancel the selection, select the Elliptical Marquee Tool, and center on the intersection of the two ruler lines. Click and hold down the Shift Alt key to draw a circular selection, then press the Delete key to delete the selection content, then press Ctrl D to cancel the selection, press Ctrl ; to cancel the ruler line, and press Ctrl R to cancel the ruler. At this point, the color disc is completed.
The final effect, as shown in the picture:
Recommended related articles and tutorials: ps tutorial
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Photoshop's core features include layers, selection tools, and adjustment tools. 1. The layer allows independent editing of image parts and supports layer style. 2. Selection tools such as lasso, magic wand and quick selection tools provide precise editing. 3. Adjustment tools such as color level, curve and hue/saturation can adjust images non-destructively.

In Photoshop, the role of layer masks is to allow hidden or displayed portions of layers in a non-destructive manner. 1. The working principle of layer mask is to control the visibility of the layer through black, white and grayscale. 2. The basic usage includes image synthesis, such as synthesising the character image into a new background. 3. Advanced usage can be achieved by using gradient masks to achieve smooth image transition.

Photoshop's powerful features include smart objects and neural filters, while free alternatives such as GIMP, Krita and Photopea do well in specific fields such as GIMP's layer functionality, Krita's digital paintings and online editing of Photopea.

Color adjustment in Photoshop can be achieved through adjustment layers to make the image more professional. 1. Use color level, curve, hue/saturation and other tools to adjust the hue, saturation and brightness. 2. Apply LUT to create unique color effects. 3. Use adjustment layers to avoid image distortion and use the History panel to track adjustment steps.

Photoshop's applications in the real world include artistic creation, scientific research and commercial marketing. 1) In artistic creation, it is used for digital painting and illustration. 2) In scientific research, it is used for image processing and data visualization. 3) In commercial marketing, it is used for advertising design and brand image shaping. The versatility of this software makes it widely used in various fields.

Adobe Photoshop goes beyond simple editing and becomes a creative tool for artists and designers. 1) It provides a wealth of tools such as brushes, stamp tools, blend modes and layer styles, supporting adjustments from basic images to complex digital paintings and 3D designs. 2) These tools implement functions through pixel-level operations, allowing users to create unique visual effects.

Photoshop offers two pricing models: single purchase and subscription service. 1. Single purchase: Pay $699 in one lump sum, permanent use, but no updates and cloud services. 2. Subscription service: $20.99 per month or $239.88 per year, and the latest version and cloud services are available. 3. Enterprise plan: $33.99 per user per month, including team management and additional cloud storage. 4. Educational Offer: Students and teachers are $19.99 per month, including multiple CreativeCloud applications.

The method to create a new layer in Photoshop is: 1. Click the "New Layer" button at the bottom of the layer panel; 2. Use the shortcut keys Ctrl Shift N (Windows) or Command Shift N (Mac). The layers are like transparent sheets on canvas, allowing design elements to be managed separately, non-destructive editing and experimenting, and improving design levels.


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