I’m having similar issues. If you put a repeater with a wysiwyg into a block, there’s barely any room in the sidebar for people to type. And I agree that many clients will find the need to switch between editing and preview modes irritating. I guess tweaking the css for the editor pages could help, maybe allocating more of the screen width to the sidebar and reducing some of the margins/paddings of the custom fields themselves, but it would be great if an ‘official’ approach was available from ACF. The more people start doing this kind of thing the more it will become a problem that needs resolving properly.
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