Annotation Styles Settings Width

Hello -
Whenever I select the ‘Annotation Styles’ Setting pane, either from the menu or the icons in the Settings window, the windows scales in width to beyond the width of my monitor, and I cannot adjust it. It isn’t a problem, but definitely an oddity. I believe this has been happening since the Version 6 release (definitely didn’t happen on V5).

Rhino for Mac Version 6 (6.19.19298.01152, 2019-10-25
MacBook Pro (Retina, 15-inch, Mid 2015), 10.13.6

Screenshot attached: