If the Chronolator toolbar was there when you opened the document but is no longer visible, you might have hidden the by accident.
If so, click the Add-ins tab to show the Chronolator toolbar.
Making the Ribbon permanently visible
You can make the Ribbon stay visible if you want. Right-click between any of the tab labels (
Home and
Insert for example) and un-tick
Minimise the Ribbon or
Collapse the Ribbon:
Word 2010 |  |
Word 2013 |  |
Word 2016 and later |  |
You can also toggle the Ribbon between visible and invisible states by pressing Ctrl + F1 .