Wikipedia:Extended Image Syntax - New Syntax For Images

New Syntax For Images

The new syntax is backward compatible, so articles don't have to be changed. In the syntax ] (e.g., ] shown in the left), several options can be set when including an image. Those affect the placing of the image, its size or the way the image will be presented. The options are right, left, center, none, sizepx, thumbnail (thumb), frame, and alternate (caption) text.

• The options can be combined, and vertical bars ("|") are used to separate options from each other.
• Do not put spaces around the vertical bars for readability – options will not be interpreted correctly.
• The options can be put in any order.
• An unknown option is taken as the caption text, but this will appear only if thumbnail or frame are specified.
• If there are two or more unknown options, the last one upstages the rest: ] (shown on the right).
  

Here is the description of the options other than the caption text: