Header rows
What is a header row?
The header row is the row of data that contains your column titles.
For example, if you have a column of data containing people's names & the title of that column is "Name", then the header row is the row number containing the "Name" text.
What do I do if Polymer isn't recognizing my header row correctly?
If Polymer is giving you a warning that your header row isn’t being identified correctly, first preview the data. You can do this by clicking the 3 dots to the right of the file name & selecting 'Customize'.

Click 'Preview' in the 'Starting Row' section to see your source data & determine whether Polymer is correctly identifying the header row.

If you see that the header row is selected correctly, you can disregard the warning message. If not, you will need to update the header row & save your selection.
How do I change my header row?
Click the 3 dots to the right of the file name & select ‘Customize’ from the menu.

From here you will be able to enter the row number that contains your header row.
