You can specify the position of an image relative to the text or other images on a webpage. The alignment of images is specified by the parameter align of the img tag.
Alternative text gives textual information about the picture if you disable image download in your web browser.
To insert an image into a document use the img tag, that has a required parameter src, which defines the address of a file with picture and alt that defines the alternative text.
To change the size of an image in HTML you can use attributes width and height of img tag.
There are two widely used formats for web graphics - GIF and JPEG.