# Settings: Apps

Options in the Marked Settings, Apps pane: (See Additional App Support)

Settings: Apps

### General settings

Text Editor
  Select a text editor to receive the current document when you type `⌘`+`E`.

Edit new files automatically
  When using the “New File” command, this option will automatically open the created file in your chosen external editor.

Links to text files should open in:
  Determine Marked’s behavior when a link clicked in a preview window leads to a local text file.

Image Editor
  Select an application to open when a local image is right clicked and “Edit image” is selected.

### Application-specific settings

Show comments and annotations by default
  If checked, annotations made in Scrivener, Fountain, and CriticMarkup documents will show up highlighted in the preview. Uncheck to hide completely. These can also be toggled while reading a document from the Gear Proofing (`⌃`+`⌘`+`C`) menu.
  When comments are enabled, comments and footnotes will appear in a sidebar. Hovering over a comment will point to where it occurs in the document.

#### Hookmark

Resolve hook:// URLs in images and links
  Marked can read URLs created by Hookmark, resolving them to their path on disk

#### Leanpub/GitBook

Enable Leanpub support
  Interpret files named `Book.txt` as index files and handle special Leanpub syntax.

Enable GitBook support
  Interpret files named `SUMMARY.md` as index files for GitBook documentation.

#### MarsEdit

Include post title as Markdown header (h1)
  Use the title of the selected post as a Markdown header.

Show metadata as table
  When enabled, metadata such as categories and titles will be displayed as a Markdown table in the preview.

#### Folders

Only preview files with these extensions
  When opening a folder, Marked will look for the most recently changed document, defaulting to the extensions `md`, `mmd`, and `html`. Settings here override the default.

#### DocC

(Info on DocC Support)

Resolve DocC image references
  Inside a `.docc` documentation catalog, resolve extensionless `![](ImageName)` references to images in the catalog `Resources` folder, including `~dark` and `@2x` variants.

#### Image variants

(Info on Image Variants)

Resolve dark and @2x image variants
  For local images with a file extension (`images/icon.png`), detect companion `~dark` and `@2x` files in the same folder and emit responsive `<picture>` markup. Works in any Markdown or HTML document, not only DocC catalogs.

#### Scrivener

(Info on Scrivener Support)

Include document titles as Markdown headers
  Parse the title of pages and nested pages to create hierarchical Markdown headers.

Open .scriv files in Scrivener when opened in Marked
  When a Scrivener document is opened in Marked, automatically open it in Scrivener as well.

#### Word

Convert change tracking <-> CriticMarkup
  If enabled, change tracking in Word documents will be converted to CriticMarkup when imported, and CriticMarkup will be converted to Word change tracking when exporting DOCX files.

#### Mind Maps/Outlines

Embed as Mermaid diagram
  Each checkbox controls one included format. When on, the included file is converted to a Mermaid mind map diagram (tidy-tree layout). When off, Marked uses the alternative for that format.
  Mind maps — iThoughts X (.itmz), MindManager (.mmap), FreeMind (.mm). If on: Mermaid mind map. If off: iThoughts embeds its preview image; MindManager and FreeMind convert to nested Markdown lists.
  OPML files (.opml). If on: Mermaid mind map. If off: nested Markdown list.
  OmniOutliner outlines (.ooutline). If on: Mermaid mind map. If off: nested Markdown list (or checklist where applicable).

#### Next up: Settings: Proofing ▶

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