| UK or US Spelling |
| Underline |
| Underline - Blue |
| Underline - Green |
| Underline - Purple |
| Underline - Red |
| Underlining |
| Undo |
| Undo Automatic Capitalization |
| Unicode Characters |
| Unlocking Fields |
| UnProtect Document |
| UnProtect Document - No Password Prompt |
| Update Automatic Links at Open |
| Update Fields - Printing |
| Update Links - Printing |
| Updating Fields |
| Updating Table of Contents |
| Upload Center |
| Upper Case |
| Use Contextual Spelling |
| Use Paragraph Mark |
| Use Smart Cut and Paste |
| Use Smart Paragraoh Selection |
| User Activity |
| User Changes |
| User Defined Styles |
| User Information |
| User Information Tab |
| User Templates |
| USERADDRESS - Built-in Field |
| Userforms |
| USERINITIALS - Built-in Field |
| USERNAME - Built-in Field |
| UTF-8 |