We are sorry to inform you that CKEditor 5 does not support Internet Explorer 11 yet.
Don't worry - we have it on our roadmap.Browser compatibility section
Synchronous collaborative editing in the same document with online users. See who is connected and what they are editing in real time.
Real-time collaboration feature can also be integrated with comments and track changes.
Integrate your content review process within the rich text editor. Select any piece of content and comment on it. Add a comment to block elements such as embedded media or images.
Use comments-only mode to offer a convenient way of adding and tracking feedback.
Track typing, deletions, splitting or merging blocks.
Track formatting or styling changes (coming soon).
Track inserting widgets, tables, images, media or any other block content.
Comment on suggested changes (coming soon).
Suggest, approve or reject changes.
Show suggestions or the final document (coming soon).