[Solved] Blacked out number in Heading Ms Word| How to fix black box heading Word (2007 and above)

Sometime because of unknown reason number formatting in a Word document gets corrupt and shows as black box here is how you can fix it. Blacked out number heading in Ms Word can cause a lot of trouble but you can easily fix it following technique give in the video. Video describes two methods to fix blacked out number in heading. Technique used applies to any heading level.