To navigate to the third tab or document on the tab bar, please press Alt+3 shortcuts. Using Alt+N shortcuts to select tab: If you have open 3 documents in Word, you can use the Alt+ 1 shortcuts to navigate the first document on the tab bar. There are 3 types of shortcuts you can use to control tab or tab bar. For example, if you want to using shortcuts to control tab or tab bar in Microsoft Office Word, please go to configure specific shortcut settings in the Office Tab Center or Tabs for Word Options.
You can use shortcuts to control tab or tab bar in specific Microsoft Office application.
Using shortcuts to quickly control tab or tab bar