External spreadsheets often contain one or several rows of notes before the actual data. Those notes end up being displayed as column names - and need to be cleaned.
Rows to header solves this problem in 3 clicks:
Click on the row number of the row containing the column names
Open the action menu in the table's header
Choose Move rows into header in the menu
The checkbox Delete rows above selection is selected by default. Unselecting it will keep all existing rows between the selection and the header of your table.
If several rows are moved into the header, the values in each selected rows will be concatenated to become the column's name.