This video will show you how to turn on and off Show/Hide in Microsoft Word and why you would want to use this feature.
The hidden characters mentioned in this video can be created with the following keyboard shortcuts:
Paragraph Mark – ENTER
Space – SPACEBAR
Line Break – SHIFT+ENTER
Tab – TAB
Non-breaking Space – CTRL+SHIFT+SPACEBAR
Non-breaking Hyphen – CTRL+SHIFT+HYPHEN