# What’s new in CotEditor 3.4 on Mac

Apply multiple replacement rules at once
  Using the new feature called “Multiple Replacement,” you can batch process text replacement with a preset definition containing multiple replacement rules. Those definitions can also be saved to reuse later.
Document outline at a glance
  Now, you can look over the auto-extracted document outline, which you might see in the navigation bar above the editor, in the sidebar inspector.
Much easier regular expression pattern editing in find panel
  The new input fields in the find panel syntax-highlight their contents when the regular expression option is enabled. In addition, the input fields also recognize and handle brace pairs properly just like the main document editor does.

## See also

- Release notes
- What’s new in CotEditor 3.3?
- What’s new in CotEditor 3.5?