Official site and Documentation:
Plain Classes is a tool that allows you to input plain classes on the Oxygen editor and bypass the Oxygen selector system. You will have no empty CSS classes rule just to use the external CSS.
(The product details and download file will be updated on June 26, 2022 -- the same day as the new Oxywind version release date)
(This feature is moved from the Oxywind plugin)
All existing Oxywind owners should claim (FREE, coupon automatically applied on the checkout page) this product before June 26, 2022