# Session journal

A **session** is one evening (or afternoon) of play. Sessions are ordered by their number
and have a title and an optional real-world date. Two sessions of the same campaign cannot
share a number.

## Writing

The editor works with **blocks**: paragraphs, headings, lists, checklists, quotes, bold and
italics. Type `/` to see every block type. A Markdown view is available too.

- `[[` opens the link menu — see [Codex and mentions](Codex-and-Mentions.md).
- Every block has a stable identity, so search results, backlinks and item origins can
  open *exactly* the paragraph they come from.

## Saving

- Notes save automatically about half a second after you stop typing. The status line
  says *Saving…*, *Saved* or shows an error.
- **Save now** forces a save; after an error, Chronexus retries and keeps your text in the
  editor — it never throws away what you typed.
- Changing session, campaign or closing the app waits for the save to finish.
- Only one copy of Chronexus can open the same archive at a time. If the same note was
  changed elsewhere, the older write is refused instead of overwriting the newer one.

> **Tip.** If the computer loses power while you type, the last half-second may be lost.
> Wait for *Saved* before closing the lid on a long note.