在编辑器中审阅 AI 建议
让 AI 提出文档修改，再在建议真正改变 Markdown 之前检查并确认。
Review AI suggestions inside the editor
Let AI propose document edits, then inspect and approve the suggestion before it changes your Markdown.
在 letter.pub 发布站点
把 Letter.md 信匣发布为拥有 letter.pub 托管地址和明确内容快照的公开站点。
Publish a site on letter.pub
Turn a Letter.md workspace into a public site with a hosted letter.pub address and explicit snapshots.
照片笔记与公开画廊
在 Letter.md 中编排更大的照片故事，并发布为响应式、可浏览的公开画廊。
Photo notes and published galleries
Arrange larger photo stories in Letter.md and publish them as responsive, browsable galleries.
在画布中组织信匣
在无限画布上排列文档和文件夹，同时保持原有信匣结构与内容不变。
Organize a workspace on Canvas
Arrange documents and folders on an infinite spatial canvas while keeping the underlying workspace intact.
离线编辑与可移植信匣备份
离线重新打开已同步文档，并导出包含 Markdown 与原始素材的可校验信匣归档。
Offline editing and portable workspace backups
Reopen synchronized documents offline and export a verifiable workspace archive of Markdown and original Assets.
原生客户端进入 Beta
在 iPhone、Android 和 macOS 的早期原生客户端中使用同一套 Markdown 与协作模型。
Native clients enter beta
Use early native Letter.md clients on iPhone, Android, and macOS with the same Markdown and collaboration model.
图片文档与素材库
把图片作为信匣内可复用的素材，并创建仍然保持 Markdown 可移植性的图片文档。
Image documents and the Asset library
Keep reusable images as workspace Assets and create photo-first documents that remain portable Markdown.
并排编辑 Mermaid 与实时预览
在 Mermaid 源码旁查看实时图表预览，并在窄屏上自动切换为上下布局。
Edit Mermaid diagrams with a live preview
Write Mermaid source beside a live diagram preview, with a responsive layout for narrow screens.
在 letter.pub 发现公开站点
从统一入口浏览公开的 Letter.md 站点，并通过规范地址打开每个发布空间。
Discover public sites on letter.pub
Browse an index of public Letter.md sites and open each publication at its canonical address.
云端文档与短链接
使用简洁的 Letter.md 链接打开同步文档，并在文档之间切换而不重新加载整个应用。
Cloud documents with short links
Move between synchronized documents without full page reloads, using compact Letter.md links.