Image content is assumed, if an URL is used or if the referenced zettel contains an image.

Supported formats are:

• Portable Network Graphics (“PNG”), as defined by RFC 2083.
• Graphics Interchange Format (""GIF"), as defined by https://www.w3.org/Graphics/GIF/spec-gif89a.txt.
• JPEG / JPG, defined by the Joint Photographic Experts Group.
• Scalable Vector Graphics (SVG), defined by https://www.w3.org/Graphics/SVG/
• WebP, defined by Google

If the text is given, it will be interpreted as an alternative textual representation, to help persons with some visual disabilities.

Attributes are supported. They must follow the last right curly bracket character immediately. One prominent example is to specify an explicit title attribute that is shown on certain web browsers when the zettel is rendered in HTML:

Examples:

• {{Spinning Emoji|00000000040001}}{title=Emoji width=30} is rendered as .

• The above image is also the placeholder for a non-existing invalid zettel or for using an invalid zettel identifier:

  • {{99999999999999}} will be rendered as .
  • {{00000000000000}} will be rendered as .