pjmetz wrote:
That's what I first tried. Nothing seemed to work until I found out that Excel spreadsheets have 16,000 columns that can't all be erased.
In an Excel workbook, empty columns to the right of your last rightmost used column are phantoms; they are merely shown on screen for user convenience, they are not part of the workbook data and do not take space on disk. Ditto empty rows below the last used row.
However, once you place data in a cell in any of the "outer" unused rows or columns the workbook is expanded to include all rows and/or columns up to & including the row & column that cell is in. Ditto if you set the Print Area to include any unused rows or columns outside your actual data area.
If you want a spreadsheet app where you can force it to show on screen only the X-Y area of rows & columns that are in actual use, try Numbers.