When you create a lengthy table, Word doesn't display the table's headings (i.e., the table's first row) at the top of each page that contains a portion of the table. This can make multi-page tables hard to read. However, you can easily configure Word to repeat a table's heading row wherever the table breaks across pages.

If you'd like to use just the first row of your table as a repeated heading, place the insertion point anywhere within the table's first row. Or, if you'd like to use more than one of the table's top rows as your table headings, select them first. Next, choose Table | Heading Rows Repeat from the menu bar.

When you do, Word automatically repeats the selected row contents wherever the table breaks across pages. In addition, Word automatically adjusts the placement of repeated heading rows so that when you add or remove rows from the body of the table, the repeated heading rows always appear at the top of the page.

And keep in mind that Word doesn't display repeated row headings onscreen when Normal, Outline or Web Layout view is active. This behavior is by design; even though repeated row headings aren't displayed in these views, they're still applied when you print your document.