Course Introduction：Photoshop's History panel and HistoryBrush tools improve image editing control by recording editing steps and allowing selective restoration. The History panel saves up to 20 operation states in the form of a timeline (customizable), supports jumping to any historical node to restore the entire file, but the record will be cleared after closing the file; HistoryBrush can restore the specified historical state in a specific area, and combines the brush settings to achieve local corrections, such as retaining the facial colors of the character in the desaturation effect. Pay attention to when using it: apply as early as possible, create snapshot backups critical stages, increase flexibility with layer masks, and pay attention to memory usage issues. Although they are suitable for quick adjustments and experimental editing, they cannot be replaced
2025-07-18 comment 0 751
Course Introduction：CSS wizard is a technique that optimizes web page performance, reducing HTTP requests by combining multiple small images into one file and locating the required parts with CSS background. 1. Create a sprite image: Use tools to combine multiple images into a large image; 2. Use CSS to set the background image and position, and display specific areas with fixed sizes; 3. Use corresponding class names to display different icons in HTML. It is suitable for frequently used icons or buttons, especially in old browsers or scenarios that require extreme optimization. However, manual coordinate maintenance is cumbersome, and efficiency can be improved with the help of automation tools.
2025-06-20 comment 0 527
Course Introduction：To run PHP files through URLs, you must build a web server environment that can parse PHP. 1. Local testing can use integrated development packages such as XAMPP, WAMP or MAMP, put PHP files into the http://localhost/ file name, and run them when you access the http://localhost/ file name in the browser; 2. When deploying to a remote server, you need to purchase a virtual host or cloud server that supports PHP, upload the file to the website root directory and access it through the domain name or IP address; 3. Quickly test small pieces of code can be used for online platforms such as 3v4l.org or OnlinePHPFunctions.com, and can be executed without building an environment. The core is to ensure that the server is configured correctly and capable
2025-06-26 comment 0 502
Course Introduction：The key to adding background images in HTML is to use CSS properties. 1. Set the background image through the background-image attribute of CSS, which can be written in a tag or an external CSS file; 2. Common configurations include background-repeat to control duplication, background-size to control size to adapt to the screen; 3. The path needs to be correct, support common formats such as .jpg and .png, and pay attention to loading speed; 4. You can add background image for specific elements such as div, just modify the selector to the corresponding class or id; 5. The inline style is suitable for temporary testing, but it is not recommended for formal projects to avoid affecting maintenance.
2025-07-06 comment 0 677
Course Introduction：SqlParameter Parameters.Add vs. AddWithValue: Choosing the Best MethodWhen working with SQL commands, you may encounter the need to add...
2025-01-10 comment 0 700
Course Elementary 13824
Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.
Course Elementary 82361
Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).
Course Elementary 13179
Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.
Course Elementary 24628
Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.
Course Elementary 27486
Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.
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