MEO Enhanced - Markdown Editor

Edit complex Markdown and see every addition, modification, and deletion as you work—all inside VS Code.

在 VS Code 中编辑复杂 Markdown，并在工作过程中清楚看到每一处新增、修改与删除。

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Install from VS Code Marketplace · Download VSIX · Changelog · Theming guide

MEO Enhanced is a Markdown editor for VS Code built around a stable Live editing workflow. It keeps source editing, rendered content, change review, advanced tables, Mermaid, LaTeX, images, and document navigation in one editor instead of splitting them across disconnected views.

It is based on Markdown Editor Optimized (MEO) and focuses on deeper interaction, review, and layout stability for larger or structurally complex documents.

Install

Install MEO Enhanced - Markdown Editor from the VS Code Marketplace, or run:

code --install-extension huangko555.meo-enhanced

Then right-click a .md, .markdown, .mdx, or .mdc file and choose Open With MEO Enhanced. To make it the default Markdown editor, run MEO Enhanced: Set as Default from the Command Palette.

For offline installation, download a .vsix package from GitHub Releases and run Extensions: Install from VSIX....

Editing modes and appearance

• Live keeps Markdown directly editable while rendering headings, tables, links, images, safe HTML, alerts, code blocks, Mermaid, LaTeX, and other rich content in place.
• Source provides a focused Markdown source editor with syntax highlighting and the same document navigation tools.
• Preview provides a read-only rendering for final review.
• Independent Dark and Light appearances can be switched from the bottom of the More menu. The selected appearance applies to the current editor and becomes the default for editors opened later, without forcing already-open editors to change.
• Consistent rendering and mode switching keep the selected appearance and reading position stable across Live, Source, and Preview.

Review changes without leaving the document

MEO Enhanced can show additions, modifications, and deletions directly beside the document, with an overview ruler for their distribution across the full file.

• Compare against Current Edits, Recent Save, or Git HEAD.
• Pin a recently saved revision as a fixed baseline and continue reviewing later changes against it.
• Inspect deleted content and move between change locations without opening a separate diff editor.
• Optionally show subtle modified-line coloring and Git author information.
• Keep change markers stable across repeated lines, tables, consecutive deletions, and long documents.

Edit real-world tables and nested content

• A sticky header keeps complete column context visible while scrolling long tables.
• Insert, remove, reorder, and select rows or columns from the table toolbar.
• Press Shift + Enter to add a line break inside the active cell.
• Use ordered lists, unordered lists, nested indentation, images, colors, inline formatting, and keyboard tags inside cells.
• Select multiple cells and copy them as text with Ctrl/Cmd + C.
• Keep tables, code blocks, Mermaid diagrams, and block formulas aligned when nested inside lists or other structures.

Work with Mermaid, LaTeX, code, images, and HTML

• Mermaid diagrams and block formulas support Source, Split, and Preview block modes.
• Split mode adds panning plus zoom, reset, and fit controls while keeping the source beside the rendered result.
• Wide Mermaid diagrams and block formulas scale to the available width in Live, Preview, and export output.
• Long fenced code blocks can collapse automatically; the behavior is enabled by default and can be disabled from More.
• Code blocks support line numbers, syntax highlighting, copying, and consistent Live/Preview/export styling.
• Images support clipboard insertion, stable local path handling, full-size viewing, and opening through the system application.
• Frontmatter Properties render Obsidian-style metadata, tags, and complex YAML values.
• Live text supports emphasis, strong text, strikethrough, ==highlight==, inline code, keyboard tags, links, colors, and line breaks.
• Safe inline and block HTML renders consistently in Live, Preview, and HTML/PDF export, including paragraphs, alignment, links, anchors, images, lists, tables, blockquotes, <kbd>, and <details>/<summary>.
• Rendered HTML blocks can switch to editable source; dangerous attributes and protocols are filtered, while unsupported or invalid content remains visible as source with a warning.

Navigate and keep your place

• Jump to an exact line from the toolbar or return to the top through the floating document button.
• Use the resizable outline on either side to collapse, reorder, and follow sections.
• Preserve the visible document position across editing, saving, folding, table interaction, rich block rendering, and mode changes whenever possible.
• Double-click the discard button to abandon all unsaved edits in the current document.

Quick reference

Configuration and themes

The editor includes independent Dark and Light appearances plus a customizable theme system. The theme picker ships with ten presets, including One Monokai, One Dark Pro, Dracula, Gruvbox, Nord, Solarized Dark, Catppuccin Mocha, Tokyo Night, GitHub Dark, and GitHub Light.

Use the Command Palette to select, export, edit, and import themes. Themes control document colors, Markdown and code syntax, typography, headings, and HTML/PDF export styling.

See the theming guide for the schema, fallback behavior, and complete token list.

Common settings include:

• meoEnhanced.outline.position — place the outline on the left or right.
• meoEnhanced.changes.baseline — select current-edit, recent-save, or git-head as the comparison baseline.
• meoEnhanced.gitChanges.visible — show or hide document change indicators.
• meoEnhanced.gitBlame.enabled — show Git author and commit details when hovering over lines.
• meoEnhanced.codeBlocks.collapseLongBlocks — enable or disable automatic folding for long fenced code blocks.

Compatibility and project scope

• Requires VS Code 1.97.0 or newer.
• Handles .md, .markdown, .mdx, and .mdc files through a custom editor.
• Uses distinct commands, settings, and editor identifiers, so it can be installed alongside the original MEO extension.
• The feature descriptions above use upstream MEO v0.1.26 as the comparison point for this fork.
• Version-by-version additions, changes, fixes, and removals are recorded in the changelog.

Acknowledgements

• Markdown Editor Optimized — original project
• VS Code — extension platform
• CodeMirror — editor core
• Obsidian — interaction design reference

License

MIT License