Decorative headings

To prevent a heading from being numbered and from appearing in the table of contents, append a ! after the last # sign. For example: #!, ##!, ###!, etc.

Example 1

```markdown
.center
    #! My document

## Introduction

.loremipsum
```

A heading with all optional flags disabled via .heading is equivalent to a decorative heading:

.heading {My decorative heading} depth:{2} numbered:{no} indexed:{no} breakpage:{no}