About captions
A caption is a numbered label, such as "Figure 1," that you can add to a table, figure, equation, or other item.
Label that you select
Number that Microsoft Word inserts for you
You can have Word automatically add captions when you insert tables, figures, or other items in your document. Or, if you've already inserted the items, you can add captions manually.
You can vary the caption label and number format for different types of items