# Change Appearance settings in CotEditor on Mac

Use Appearance settings in CotEditor to choose the appearance of documents, such as font, line height, and colors.

To change these settings in the CotEditor app on your Mac, choose CotEditor > Settings, then click Appearance.

Option | Description
--- | ---
Standard font / Monospaced font | The standard and monospaced fonts for the text in editors. Set which font is used for which document in the Mode settings. Font The font and font size. To change the font, click the Select button, then choose a font name or font size in the Font window. Antialias Apply the antialiasing to the editor’s text. Antialias is a rendering feature that smoothes jagged edges. Ligatures Apply the standard ligature rules to the editor’s text, or turn off all ligatures. A ligature is a typographic feature joining specific characters as a single glyph.
Line height | The line height with a value indicating the multiple of a line. The range must be from 0.1 to 10.0.
Appearance | Choose the document window appearance regardless of the system appearance state.
Editor opacity | Drag the slider or input the percentage to change the default editor opacity.
Theme | Choose your default coloring theme for editors, and manage themes. See Customize themes for about the theme customization.
Theme list | Choose your default theme for editors.
Add +, Remove - | Create a new theme or remove the selected theme. The themes bundled with CotEditor can not be removed.
Action pop-up menu | Duplicate Duplicate the selected theme to make your own one. Restore Restore the selected theme to default. This command is available only for bundled themes. Export Export the theme file made from the selected theme. With exported files, custom coloring themes can be used on another computer. To use the exported file, do Import. Share Share the theme file made from the selected theme. Import This allows you to use a theme created on another computer. After selecting Import, choose the theme file to import.
Theme editor | Edit the selected theme. Click the color wells to choose colors.

## See also

- Customize themes
- Change settings