It is great you started from the documentation, but it seems to me you somehow missed the first sentence of the quoted article:
CKEditor can be easily integrated with an external file browser/uploader.
This means that you need to start from finding such an external file browser and then try to configure it according to the doc. It is not the matter of "switching something on" in CKEditor -- what you need is a separate module or product (the said file browser/uploader) that you can then integrate with the editor in order to be able to upload the files.
CKSource offers such a file browser called CKFinder, this is the thing that is mentioned in the Using CKFinder section of the quoted doc along with some configuration options. There are also other external solutions available, so in any case before you gather any tips on the configuration of CKEditor you have to know what you are going to use.
Re: Image Uploader for Beginners
Re: Image Uploader for Beginners
Re: Image Uploader for Beginners
finding separate
CKFinderUsing CKFinder
Documentation Manager, CKSource
See CKEditor 5 docs, CKEditor 4 docs, CKEditor 3 docs, CKFinder 3 docs, CKFinder 2 docs for help.
Visit the new CKEditor SDK for samples showcasing editor features to try out and download!
Re: Image Uploader for Beginners
Re: Image Uploader for Beginners
IntegrationCKEditor 3.x Developer's Guide
CKEditor IntegrationCKFinder 2.x Developer's Guide
Documentation Manager, CKSource
See CKEditor 5 docs, CKEditor 4 docs, CKEditor 3 docs, CKFinder 3 docs, CKFinder 2 docs for help.
Visit the new CKEditor SDK for samples showcasing editor features to try out and download!