Create Table Dialog Box
The Create Table dialog box displays if you click Create Linked Table in the Excel window and do not have a table selected in an Excel worksheet. After you click OK in this dialog box, your selection is formatted as a table, and the linked table is displayed in the PowerPivot window. For more information about linked tables, see Add Data by using Excel Linked Tables.
Where is the data for your table?
Enter a range of cells for the table, or click the icon to open the Range Selection dialog box.My table has headers
Clear this checkbox if the selected data does not include headers for the table.