# Change Mode settings in CotEditor on Mac

Use Mode settings in CotEditor to vary the behaviors of the editor depending on the document’s type.

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

Modes
Option | Description
--- | ---
Mode | Select the mode to edit in the right pane.
Add + | Add mode settings for a specific syntax.
Delete - | Delete the mode options for selected syntax. You can not delete mode options for syntax kind (General/Code).

Mode Options
Option | Description
--- | ---
Prefer font using | Select whether to use the standard or monospaced font in editors. Each font are set in the Appearance settings.
Smart copy/paste | A halfwidth space is automatically added between the words when you paste or drag a word in between other words to maintain that boundary. Meanwhile, any extra spaces are automatically removed when you cut/delete a word.
Smart Quotes | Inserted quotes (") are automatically substituted with the matched quote (such as “ or ”).
Smart Dashes | Inserted hyphens (--) are automatically substituted with a dash sign (—).
Add period with double-space | Pressing the Space bar twice after a word inserts a period (.).
Automatically insert closing brackets and quotes | Typing an opening bracket or quote character inserts a matching closing character automatically and moves the insertion position between them.
Check spelling while typing | Automatically check your spelling as you type. When your spelling is checked, misspelled words are underlined in red, and suggested corrections are shown.
Check grammar with spelling | Automatically check also the grammar as you type. Grammar errors are indicated by a dotted blue underline. Move the pointer over an underlined word to see a description of the problem. Note: Grammar-checking is not available for every region, country, or language.
Correct spelling automatically | As you type in the editor, misspelled words are detected and automatically corrected. An automatically corrected word is briefly indicated by a solid underline. You can even undo the autocorrection.
Completion list includes | Choose the range of possible completions that appear in the completion list. Standard words: The list includes standard words. Words in document: The list includes the words that appear in your document. Words defined in syntax: The list includes the words defined in the syntax (in the case you’ve not specified any completions, the words generated by the syntax definition appear).
Suggest completions while typing | The completion list is automatically shown while typing if words to complete exist.

## See also

- Change settings