CKEditor is a highly flexible tool that you can easily customize to your needs. If you want to change the editor configuration, refer to the Setting Configuration article from the Developer's Guide. Your custom configuration will help you adjust the CKEditor look and feel to the requirements of your project.
How Do I Change the Default CKEditor Configuration?
This website contains links to software which is either no longer maintained or will be supported only until the end of 2019 (CKFinder 2). For the latest documentation about current CKSource projects, including software like CKEditor 4/CKEditor 5, CKFinder 3, Cloud Services, Letters, Accessibility Checker, please visit the new documentation website.
If you look for an information about very old versions of CKEditor, FCKeditor and CKFinder check also the CKEditor forum, which was closed in 2015. If not, please head to StackOverflow for support.