When working with responsive emails, you may want to some content to be shown on mobile and some slightly different content to be shown on desktop. To allow for this common use case, we've added a Show on Mobile/Desktop/Both option to the drag and drop content editor. By default every section and content block is visible on both sizes of device and scales appropriately, but if you want more specific control, this control allows you to easily define if any section or content block should only be visible on one of the two device sizes.