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Save As downloads them as a new CSV file and leaves the original as it was. Discard throws them away. Escape leaves the question for next time.
Save writes them back to the file. Save As downloads them as a new CSV and leaves the original as it was. Discard throws them away. Cancel keeps things as they are.
The map prints as you see it now, with a legend box in the corner. Clear the date to leave it off. To keep a file, choose “Save as PDF” in the print dialog.