Thanks for writing in! This feature has been disabled while ago, because it’s not compatible with the X grid system.
You can use our visibility shortcode instead (https://theme.co/apex/forum/t/shortcodes-visibility/185).
Or else we would highly recommend using Cornerstone when building your pages, so that you can easily create sections, rows, columns and even hide/show these sections in different screen size. For more details about Cornerstone, please check the following guide (https://theme.co/apex/forum/t/cornerstone-content-builder-introduction/118).
Let us know if you have any other questions.