Process a spreadsheet with HED tags
Upload a spreadsheet (tsv, txt, or xlsx) and select a worksheet.
Check the column numbers that contain HED tags.
If the entries in a column should have a prefix appended to make the entry values
into HED tags, enter that prefix in the adjacent text box.
Select a HED schema, pick an action, and press Process.
You will see either a downloadable results file or a status message.