The steps to create a custom brush in Photoshop are as follows: 1. Select a pattern with clear edges and suitable for brushes, such as hand-painted textures or photo parts, and adjust it to the appropriate size; 2. Use the "Magic Wand Tool" or "Quick Selection Tool" to remove the background to ensure that the pattern is in an independent selection; 3. Create a basic brush through "Edit > Define Brush Presets"; 4. Adjust the parameters such as "Shape Dynamic", "Scatter", "Text" and "Transfer" in the "Brush" panel to make the strokes more natural; 5. Finally, click "Save As Brush" to save as a .abr file for convenience of subsequent use and sharing.

Photoshop's quick selection tool is suitable for selecting areas with similar colors and clear boundaries. The usage methods include: 1. Find and activate the tool, right-click or long-press to switch or press the shortcut key W to ensure that the layer is unlocked; 2. Adjust the brush size, combine the Alt or Option key to switch the selection mode, Shift key to add selection, and improve accuracy through the option bar setting sampling method; 3. Use the "Select the Subject" function to assist in selection, and then manually optimize edge details, especially suitable for portraits or product images.

When AutoCAD file is corrupted, you can take the following steps to try to restore: 1. Check the automatic backup of the file, check whether there is a .bak or .sv$ file in the folder where the original .dwg file is located, and rename the .bak file to .dwg to open it; 2. Use the RECOVER command to try to repair the file, and if it fails, use the -OPEN command to open the file for partial recovery; 3. Use third-party tools such as DataNumenDWGRepair, RecoveryToolboxforDWG, etc. to deal with seriously damaged files. To prevent future damage, you should save regularly and use "Save As" to refresh the file structure, keep the software updated, avoid saving through network drives, enable automatic save and set up

To remove PDF password protection, use Adobe AcrobatPro and have the document owner password. The steps include: 1. Open Adobe AcrobatPro and select a password-protected PDF file; 2. Enter the correct owner password; 3. Go to "Tools" > "Protection" > "Encryption" > "Remove Security"; 4. Click "OK" in the pop-up window to confirm the removal. If AcrobatPro is not available, you can ask others for assistance or use third-party decryption tools, but you need to pay attention to privacy risks. Common problems include invalid password, grayed out security settings, and prompting for passwords after removal. The solution is to check password input, try to convert file formats, or update software versions. If it cannot be resolved, please contact A

Remote Desktop connection problems can be checked through the following steps: 1. Check the network and firewall settings to ensure that the TCP3389 port is open; 2. Confirm that the remote desktop function is enabled and supported by non-home version systems; 3. Verify user permissions and belong to the "RemoteDesktopUsers" group or administrator; 4. Handle black screen or lag, adjust the display options or restart the remote computer. Check them one by one in order, and most problems can be solved.

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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