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Adobe Photoshop does not have a permanent free version, but can be legally used in the following ways: 1. The official website provides a 7-day free trial, complete functions but automatic renewal is required; 2. Use a simplified version based on the browser (Beta), which supports basic editing functions; 3. Students or teachers can obtain a full-featured version through the school education plan; 4. Consider alternative software such as GIMP, Photopea, Krita or Canva Pixlr to meet daily needs. The above methods can meet the needs of different users and ensure legal and compliant use.

Friends who are just beginning to get involved in AutoCAD3D modeling can start with the following steps: 1. Start practicing from basic geometry (such as cubes, cylinders, spheres), use BOX, CYLINDER, SPHERE and other commands to build simple models and combine them into complex structures; 2. Master Boolean operations (UNION merge, SUBTRACT cutting, INTERSECT intersection) to create solid models with holes or combined structures; 3. Pay attention to the settings of the view and coordinate system (UCS), switch the view angle to understand the structure, and ensure the correct operation direction by adjusting UCS; 4. After completing the modeling, it can be exported to STL, STEP or IGES format for easy printing or sharing, and use SECTIONPLANE

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The key to distorting pictures in Photoshop is to master three common methods. First, use the "Warp" function to freely adjust the image shape. Press Ctrl T to call out the transformation box and select "Deformation", and bending and stretching by dragging the points on the image; Second, use the "Liquefaction" function to perform local deformation, select the layer and enter the "Liquefaction" window, and use the "Forward Deformation Tool" to brush the target area, which is suitable for face slimming or adjusting details; Third, use "Twisting" or "Performance Deformation" to make the picture fit the spatial angle, and select the corresponding mode after calling out the transformation box and drag the corner matching screen. These methods are suitable for different scenarios and need to be flexibly applied according to actual needs.

Rotating the canvas in Photoshop does not affect the image content, it can be achieved through the Navigator panel or shortcut keys. 1. Use the Navigator panel: After opening the panel, drag the mouse on the edge of the preview box to rotate the canvas in real time. 2. Use shortcut keys: Press the R key to activate the rotation view tool, drag the mouse to rotate; Shift R can temporarily switch back to the original tool. 3. Reset the angle: Click the "X" icon in the upper right corner or double-click the left mouse button to restore the default direction. Pay attention to distinguishing the "rotating image" function to avoid misoperation.

Bates numbering is a numbering system used in legal documents to uniquely identify files. Adobe AcrobatPro can be added through the following steps: 1. Turn on the "Bates numbering" function in the tool; 2. Set the starting number, format, location and style; 3. Apply automatically after confirmation. Multiple files can be merged first and then unified to avoid duplication. Notes include: adjusting the numbering position to avoid the content area, previewing the effect before application, backing up the original file, and saving the complete version before splitting.

Mastering the key techniques of Photoshop liquefaction tools can improve the photo editing effect. 1. The method to open the liquefaction tool is to click "Filter" > "Liquefaction" or use the shortcut keys Shift Ctrl X (Windows) or Shift Command X (Mac). 2. The core settings include brush size, density and pressure. It is recommended that the brush be slightly larger and the pressure be set to about 50% to achieve a natural transition. 3. Common uses include slimming the face, adjusting the shape of the eyes and mouth, and smoothing the skin. When operating, you should use a small brush to gently handle it and enlarge the preview details. 4. Methods to avoid errors include avoiding excessive deformation, making good use of reconstruction tools, copying layers in advance, and realizing that liquefaction is not omnipotent to use with other tools. Reasonable use of liquefied tools can make the

There are two ways to reset Photoshop preferences. 1. Shortcut key method: Press the Ctrl Alt Shift of Windows or the Command Option Shift key combination of Mac at startup. After the prompt pops up, click "Yes" to delete the settings folder and complete reset. 2. Manual deletion method: After closing Photoshop, find the preferred file path and delete or rename the Adobe Photoshop [version number] Prefs.psp file. After restarting, a new default settings file will be automatically generated. Resetting will affect interface layout, shortcut keys, unit rulers, plug-in status and other settings, but will not affect PSD files, preset brushes, actions and other contents. It is recommended before operation