An error occurred while saving the commentDex commented
Doubtful they will offer theme support. I just installed O365 / Office 2019 for Mac and they actually removed the theme option that was in 2016, so now there's just the default one. For editing in dark areas or if my eyes are tired I just invert the screen. To enable, go into System Preferences, Keyboard, Shortcuts, Accessibility, check the box for Invert colors. Pressing ctrl-option(alt)-command(apple/windows)-8 will activate/deactivate.