Try this.
https://world.episerver.com/documentation/developer-guides/CMS/add-ons/Customizing-the-TinyMCE-editor/Property-settings/
https://world.episerver.com/blogs/Linus-Ekstrom/Dates/2014/10/typed-property-settings/
What do you want to do? Different settings for different properties?Would you like to assign those settings with an attribute, like you used to do before?
Have a look at my blog post: https://blog.novacare.no/episerver-tinymce-settings-attribute/