If the Dark Mode is of no appeal then you can even turn off the option of selecting it by personalising your Office options and disabling dark mode. Importantly the change won't affect how it will print or how document collaborators see the file. When you switch to a dark canvas Microsoft Word will intelligently shifts colours of textual elements to show up better.
To subsequently toggle the canvas colour between black and white just click View > Switch Modes. Just head on over to File > Account > Office Theme > Black. Selecting and using the new mode is pretty simple. Going forward the Black Office theme will include your document canvas as well as the UI furniture. 'As we log long hours with our screens, it has become increasingly important to reduce eye strain and accommodate light sensitivity,' blogged Ali Forelli, a Program Manager on the Word team who works on accessibility.
Previously, the best its Dark Mode could do is enable a dark ribbon and toolbars but it wouldn't affect the colour of the page, the canvas where you type in Word… In a dark environment it is quite obvious working on a white page could be a source of considerable glare. Microsoft is finally implementing a 'long-requested feature from many of Officer Insiders.' It has decided make Dark Mode in Word more encompassing.