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The magnetic lasso tool is suitable for images with obvious edge contrast. The key points include: 1. Use the shortcut key L or select the tool from the tool group. After clicking the starting point along the edge of the object, slowly move the mouse, and the tool will automatically absorb and add anchor points; 2. In terms of parameter settings, the width is recommended to be set to 10~30, and the edge contrast is the default. The higher the frequency, the more anchor points; 3. In actual application, other tools can be replaced in the blurred edges. Zooming the image will help to accurately select, and the anchor points can be adjusted manually if necessary. Mastering these skills can effectively improve the efficiency of the selection.
Using Photoshop's magnetic lasso tool is actually not difficult. The key is to master its characteristics and applicable scenarios. This tool is especially suitable for selecting objects with obvious edge contrast, such as images with large differences in color between the subject and the background. As long as you understand its working logic, you will get started quickly.

1. Basic operation: How to start and use magnetic lasso
In Photoshop, you can find the "Lasso Tool" group through the shortcut key L or from the toolbar on the left, and right-click to select "Magnetic Lasso Tool". After selecting, just click as the starting point along the edge of the object you want to select, and then slowly move the mouse along the edge. The tool will automatically adsorb to the edge and add anchor points.

Tip: Don't move too fast, give it a little time to identify edges.
If you find that it has started to go off the wrong way, you can press the Delete key to delete the recent anchor points and readjust the route.

2. Adjust settings to make the effect better
The performance of a magnetic lasso depends heavily on your parameter settings for it. Double-click the tool icon or open the Settings panel in the top option bar, with three key parameters:
- Width : refers to the range of the tool detection edge, and it is recommended to set it between 10 and 30.
- Edge Contrast : The higher the value, the easier it is to identify high-contrast areas. Generally, the default value can cope with most situations.
- Frequency : Controls the density added by anchor points. The higher the value, the more anchor points, and the more fine the adjustment.
If you encounter situations where the edges are not obvious, it may be helpful to lower the "edge contrast" properly.
3. Tips in practical applications
Although magnetic lasso is easy to use, it is not omnipotent. Here are some practical suggestions:
- If the edges are blurred or the color transition is smooth, such as hair, hair and other details, it is recommended to use the Quick Selection or Object Selection tool.
- For relatively regular shapes, such as architectural and text outlines, magnetic lasso often performs well.
- It is best to enlarge the image (Ctrl “ ”) before using it, so that you can see it clearly before you can choose it correctly.
- Press and hold the space bar to temporarily switch to the gripper tool, making it easier to move the screen to view other areas.
Sometimes even if it doesn't fit the edges completely, you can manually add anchor points to get a good selection.
Basically that's it. By mastering the core points of the magnetic lasso tool, you can save a lot of time in many simple constituency tasks.
The above is the detailed content of How to use the magnetic lasso tool in Photoshop. For more information, please follow other related articles on the PHP Chinese website!

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