I would like to add custom styles to ckeditor. There is a button for that, but cannot get my styles listed. I managed to add the js with the new styles, with backdrop_add_js() function (instructions here: https://ckeditor.com/docs/ckeditor4/latest/features/styles.html).
But then I need to add those styles to the config file of ckeditor, as stated here: https://ckeditor.com/docs/ckeditor4/latest/guide/dev_configuration.html#.... I'm unable to do this last step. Any ideas?