Invented by William Oughtred in the 1600s but only used in the mid 1800s
Commenting. When someone comments of a blog the blog's writer can comment back, to answer questions, etc.
Answer:
Alt + F9
Explanation:
The Keyboard shortcut that Stephen can use use to toggle between data and the field codes is Alt + F9. This is in regards to Microsoft Word Fields for both Windows and Mac operating systems. Although ALT + F9 will toggle between these two but for all the fields within the document. If you want to toggle between a single or various fields it would be Shift + F9.