# Settings: Preview

Options in the Marked Settings, Preview pane:

Settings: Preview

### Preview behavior

Enable Mini Map navigation
  Generate a visual map of the document which shows up when “0” is pressed. May cause short delays when rendering large documents.

Headlines collapse sections
  Clicking a headline element collapses the section between it and the next headline.

Require `⌘`‑click
  If this is checked, headlines will only collapse/expand when clicked with the Command key held.

Sync preview and source scroll
  When your editor supports it, keep the preview scrolled to match the corresponding location in the source document.

Sync Speed Reading with scroll position
  Keep the Speed Reading overlay aligned with the preview scroll position. You can also toggle this from the Speed Read overlay.

### Scroll to edit

Scroll to edit
  When updating the preview, Marked can determine the first point where the document changed and automatically scroll to it. This keeps the preview in sync with your current location in the document you’re editing. The most recent edit marker is the first difference in the document since the last refresh. Enabling “Reverse diff order” will instead consider the last difference in the document (from top to bottom) to be the most recent edit.

Show most recent edit marker
  A small red marker appears at the point of the first edit detected. Turn this off to make it invisible. (Requires Scroll to edit.)

Show all diff markers
  If this is enabled, all differences between the last refresh and the current contents will be highlighted in the gutter. You can navigate through the edits, scrolling them to the middle of the view, using `e` (forward) and `⇧`+`E` (backward).

Reverse diff order
  If this is enabled, diffs will be marked in reverse order (from bottom to top). This affects the navigation, so `e` will navigate up, and `⇧`+`E` will navigate down. The “most recent edit” will become the last difference in the document.

### Additional features

Table of Contents tracks scroll position
  Table of Contents highlights current section.

Popup stats for text selection
  Show a word count popup for the selected text whenever a selection is made.

Enable link popovers
  Show a popup menu when external links are clicked and held before releasing.

Automatically validate URLs on update
  Validate URLs on document load and refresh. Only displays results if there are errors.
  This runs link validation every time the document updates (if you have a significant number of links, this can be a slow process and should be avoided).

### Wiki linking

Convert [[Wiki Links]]
  Enable Marked’s wiki navigation for `[[wiki link]]` syntax.

Default Extension
  The filename extension Marked uses when resolving wiki links that do not include an extension (for example, `md`).

### Appearance

Dark Mode
  Display all windows in “High Contrast” mode, with dark chrome and, if available, the inverted version of the current Style (may not apply to Custom Styles).

Match System Setting
  Switch Dark Mode automatically when macOS Dark Mode is turned on or off system-wide.

Show full path in window title
  When enabled, Marked will display the full path to the current document in the window title.

#### Next up: Settings: Style ▶

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