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Click back and forth between the tabs to verify the column order, click on a header and drag and drop into the desire order. This moves not only the header, but also the data below it.
Common Editing Questions
What if just my column headers are in the wrong place?
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What if I see a typo in the .csv data?
If you see any of these issues, proceed to Step 4 - Edit data as needed.
Otherwise, if your columns match up perfectly and none of the data needs editing, skip to to Step 5 - Drag rows to the Section Grid