Zettels may contain optional metadata in the YAML frontmatter.

## Date

The date of the zettels can be specified in the “date” metadata field. The time part is optional.

---
date: 2020-08-21T13:06
---

Date is used in a number of places in neuron:

• neuron new automatically fills in the date field.
• Tag Queries’s timeline flag displays the date in zettel listing.
• Date is used in Web feeds

## Slug

The “slug” of a zettel is used in its URL, which in turn is determined by the filename of the generated HTML file. By default neuron will use the lowercase version of Zettel ID, with whitespace replaced with hyphen as the slug, which may be overriden here.

---
slug: foo-bar
---

## Pinning

Zettels can be pinned in Impulse so that they appear at the top. To pin a zettel, add the “pinned” tag (see Tags#) to it.

---
tags:
- pinned
---

## Hiding a zettel

Sometimes you want to “draft” a note, and as such wish to hide it from the rest of Zettelkasten, notably in Impulse. This can be achieved by marking a zettel as “unlisted”:

---
unlisted: true
---

You can explicitly specify a title using the title metadata; otherwise, Neuron will infer it from the Markdown heading or Zettel ID.
The metadata key tags or keywords can be used to specify tags, although neuron supports inline tags as well (see Tags#).