We got our bikes serviced, so they're ready for the season, so I added a new column to Vital_statistics.ods, the spreadsheet I'm keeping my daily steps and weight data in: Bike Miles.
She was watching over my shoulder as I was putting in the first entry -- the trip we took to Baseline and Broadway -- and she said, "You know, you can make the column headers stay in the window when you scroll."
She showed me how. Click on the number of the blank row below the column headers, to mark it, then Window->Freeze. Now, as I scroll, the headers stay visible.
Learning one trick at a time.