#### 9.4.2 Box Tags

Boxes can also have tags, which are small enclosed labels at the top-left corner of the box. Tags are useful to label the content of the box, such as alternatives, loops or optional sections, while keeping the ability to add a regular box label, as well.

To specify a tag, use the `tag` attribute, and specify the label of the tag. If the label contains non-alphanumeric characters (or spaces), you need to put them in between quotation marks. You can specify the appearance of the tag via the `tag.line.*`, `tag.fill.*` and the `tag.text.*` attributes. Especially the `tag.line.corner` attribute can be used to influence the bottom right corner of the tag (but not the other corners).