A long table becomes difficult to read when page two contains values without column labels. In desktop Word for Windows, you can repeat its header rows automatically as the table flows across pages.

Work in a copy if the table is part of an issued report. First identify which rows are actual labels. A title merged across the full width and a second row of column names may need to be considered together; repeating a random data row would mislead the reader.

Choose the header at the start of the table

Select the header row or rows, including the table’s first row. Under Table Layout, choose Repeat Header Rows. Microsoft also documents the equivalent checkbox in Table Properties on the Row tab.

Use Print Layout or print preview to inspect the result. Repeated headers are not visible in every editing view. Edit the original header at the top of the table when its wording needs correction; the repeated copies on following pages are not independent labels.

If repetition stops unexpectedly, inspect whether someone inserted a manual page break inside the table. Microsoft states that headers repeat over automatic page breaks, but not over a manual break within the table. Preserve a copy before restructuring a table whose layout is already complex.

Verify the labels against the data

Check the first row of data on each continuation page. Confirm that each value still sits below the correct label and that the repeated header is not taller than expected.

Try a small content change in the working copy, such as adding one test row, to confirm that a newly created page inherits the header. Remove the test afterwards.

Finally, inspect the exported or printed version, including the last page. Avoid manually copying headers into the middle of the table as a substitute: those copies can become ordinary data rows and drift away from page boundaries during the next edit.

References: Microsoft: repeating table headers.