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an image that is not rectangular can be filled to the required rectangle using transparent surroundings; the image can even have holes (e.g. be ring-shaped) in a run of text, a special symbol for which an image is used because it is not available in the character set, can be given a transparent background, resulting in a matching background.
WebP is a raster graphics file format developed by Google that supports both lossy and lossless compression, as well as animation and alpha transparency. It is based on the VP8 video format and the Resource Interchange File Format (RIFF), and has a filename extension of .webp.
PNG stands for Portable Network Graphics, a raster-graphics file format that supports lossless data compression. It was developed as a non-patented replacement for GIF and has various features such as palette-based, grayscale, and full-color images, transparency, and textual comments.
Our "Cheatsheet" is a good starting point for learning basic Wikipedia formatting.A more complete guide is here.. You can take some formatting tips from the standard way Wikipedia articles are laid out.
The only requirement was that this image was invisible, either by being the same color as the page, or by being transparent. Spacer GIFs themselves were small transparent image files. GIF files were used as it was a common format that supported transparency, unlike JPEG. These files were commonly named spacer.gif, transparent.gif or 1x1.gif.
Media in category "Images that should have transparent backgrounds" The following 137 files are in this category, out of 137 total. 10th Anniversary Camillia Bowl.jpg 412 × 242; 76 KB
GIF is a bitmap image format that can contain multiple images and animations, developed by CompuServe in 1987. Learn about its history, compression, controversy, pronunciation and usage on the web.
Text resizing, which appears in Internet Explorer's View menu, affects text but not images. This method can disrupt annotated images, as the text is scaled up but the image content and frame are not. Firefox and Opera do not use this mechanism, but users could be able to customize via browser preferences, extension, or user styles.