I don't know if anyone else is experiencing this, but the full screen option introduced in 6.0 is still not working correctly in 6.1. The readme says, "New: Full screen pages are now conditionally full screen based on the WordPress fullscreen mode user preference setting." The problem is that for this to work, if you don't open the page/post editor first before navigating to the Formidable build screen, Formidable opens in full screen mode and there's no way to get out of it. Second, the readme refers to the "WordPress fullscreen mode user preference setting" This user preference setting is only available in the block editor. For people still using the Classic TinyMCE editor, there is no way to set the WordPress fullscreen mode user preference setting. PHP snippets available to permanently disable fullscreen mode only work for the block editor.