The Editing tabs define all options that fine tune DEVONthink's text editing behavior. Everything from default fonts to text and highlight colors as well as margins and automatic text transformations, like smart quotes.

## General

Author: Enter the default name to be used for metadata, placeholders, etc.

Ruler Units: Set the units used for the Format > Ruler when editing rich text. Choose from: Centimeters, Inches, Points, or Picas.

Rich Text Attachments: Control the behavior of PDF and image attachments in rich text-based formats.

- Display PDF attachments of rich texts: Display a scrollable preview of an attached PDF in RTFD documents. When disabled, it will display the PDF's icon, filename, and the size.
- Scale image attachments: Visually scale large images to the width of the view/edit pane when attached to rich text documents and formatted notes. This does not effect the actual dimensions of the attached image.
- Typewriter-like scrolling: Keeps the currently edited line in the center of the window or view/edit pane.

Spelling & Grammar:

- Check spelling while typing: Spellcheck while you write.
- Check grammar with spelling: Check grammar as well as spelling while you write.
- Correct spelling automatically: Correct misspelled words automatically.
- Check and correct spelling in rich text documents only: Limit spellcheck and correction to rich text formats, including web-based formats like formatted notes.

Substitutions:

- Smart copy/paste: Insert or remove spaces before and after cut or pasted text.
- Smart quotes: Convert straight quotes ("inch marks") to typographer's quotes ("curly quotes") while you type.
- Smart dashes: Convert characters, e.g., two hyphens into a proper dash.
- Smart quotes and dashes in rich text documents only: Limit converting quotes and dashes to rich text formats, including web-based formats like formatted notes.
- Smart links: Detect web addresses and turn them into clickable links.
- Data detectors: Detect dates, times or addresses in text, and show possible actions when the mouse cursor moves over them.
- Text replacement: Use the system-wide text replacements when editing text.

## Format

Define the visual settings for plain text formats, including Markdown source, and rich text formats, including formatted notes.

Plain Text: Choose the Plain Text Font, as well as the Background and Text colors. If you have a plain text document selected, the font and colors will dynamically update as you make changes. There are also two settings for controlling the width of the content:

- Max. Line Width: Set the maximum width of the contents (in points).
- Margin: Set the document margins (in points).
- Line Spacing: Choose the spacing between lines of text in points.
- Line Height Multiple: Adjust the spacing between lines as a multiple of the line's height.

Rich Text & Note Font: Set the default font for newly created rich text-based documents. Changes do not apply to existing documents. To change existing documents, use the commands in the Format menu while editing specific documents.

Full Screen: Choose the Text and Background colors to be used when editing a document in DEVONthink's fullscreen mode. These settings will override the colors in non web-based documents. The Width is a percentage of the screen's width, defining the width of the content in fullscreen view.

## Highlighting

Set the name and color for highlighting text in compatible file formats, like PDFs. Changing the colors will not change the highlight colors already applied in existing documents. Also, be aware these are global settings, so you can't have different highlight names and colors for each database.