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How to insert, edit, replace, and resize images Images form an integral part of a website by providing additional context for the site visitors. Although a wide variety of graphic file formats exist, GIF, JPEG, and PNG file formats are commonly used in web pages. GIF and JPEG file formats are compatible with web pages, and can be viewed in most browsers. The following text gives more information about these file formats:GIF (Graphic Interchange Format) – GIF files use a maximum of 256 colors, and are best for displaying noncontiguous-tone images. GIF files are ideal for displaying large areas of flat colors, such as navigation bars, buttons, icons, logos, or other images with uniform colors and tones.Insert an imageWhen you insert an image into a Dreamweaver document, a reference to the image file is generated in the HTML source code. To ensure that this reference is correct, the image file must be in the current site. If the image is not in the current site, Dreamweaver asks whether you want to copy the file into the site.Dreamweaver also allows you to insert images dynamically. Dynamic images are those images that change often. For example, advertising banner rotation systems that randomly select a single banner from a list of potential banners. The system dynamically displays the selected banner’s image when a page is requested.You can also drag-and-drop any layer from the Extract panel to any place in Dreamweaver Live View using Live Guides and Element Quick View. The Extract Panel allows you to upload PSD files and then drag-and-drop any layer in the PSD file directly into your Dreamweaver document.After you insert an image, you can set the image tag and accessibility attributes that screen reader’s pick up for visually impaired users. You can edit these attributes in HTML code.Place the insertion point where you want the image to appear in the Document window and do one of the following:In the Insert panel, select HTML from the drop-down list. Click Image. Double-click or drag the icon to the document window (or to the Code view window if you are working using code).Select Insert > Image.Drag an image from the Assets panel (Window > Assets) to the desired location in the Document window; then skip to step 3.Drag an image from the Files panel to the desired location in the Document window; then skip to step 3.Drag an image from the desktop to the desired location in the Document window; then skip to step 3.In Live View, drag an image from the Extract panel or the Layers tab. Drop the element at the top, bottom, right or left of an element, based on Live Guides. Alternatively, you can drop the element at a precise place in the document structure by clicking </> and using Element Quick View.Browse to select the image or content source that you want to insert.Resize an imageYou can visually resize elements such as images, plug‑ins, Shockwave or SWF files, applets, and ActiveX controls in Dreamweaver.Visually resizing an image helps you see how the image affects the layout at different dimensions but it does not scale the image file to the proportions that you specify. If you visually resize an image in Dreamweaver without using an image-editing application, the user’s browser scales the image when the page is loaded. It might cause a delay in page download time and the image is not displayed properly in the user’s browser.To reduce download time and to ensure that all instances of an image appear at the same size, use an image-editing application to scale images. Read the following procedure to know how to visually resize an element.JPEG (Joint Photographic Experts Group) – The JPEG file format is the superior format for photographic or continuous-tone images, because JPEG files can contain millions of colors. As the quality of a JPEG file increases, so does the file size and the file download time. You can strike a good balance between the quality of the image and the file size by compressing a JPEG file.PNG (Portable Network Group) – The PNG file format is a patent-free replacement for GIFs that includes support for indexed-color, gray scale, true-color images, and alpha channel support for transparency. PNG files retain the original layer, vector, color, and effects information such as drop shadows. Further, all the elements are fully editable always. Files must have the .png filename extension to be recognized as PNG files
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