A full listing of the CKFinder.config configuration settings that you can change in order to customize the editor to your needs can be found in the CKFinder JavaScript API. Use the methods described in the Configuration articles from the Developer's Guide for an appropriate server-side version.
How Do I Find the CKFinder Configuration Settings to Change?
This website contains links to software which is either no longer maintained or will be supported only until the end of 2019 (CKFinder 2).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.