Tables have a placeholder name, such as “Table 1,” that you can show, edit, or hide. Each table in a document must have a unique name.
Do one of the following:
Control-click the numbered bar to the left of row 1, then choose Show Table Name or Hide Table Name.
Click the Table tab at the top of the sidebar on the right, then select or deselect the Table Name checkbox.
If you don’t see a sidebar, or it doesn’t have a Table tab, click 
in the toolbar.
With the table name showing, do any of the following:
Change the table name: Triple-click the name, then type a new one.
Enclose the table name in a border: Click the Table tab at the top of the sidebar on the right, then Select the “Outline table name” checkbox.
If you don’t see a sidebar, or it doesn’t have a Table tab, click in the toolbar.