I was thinking of min-max. You can select an area of cells as a series, and so display numerous min-max lines. Also matrix and contour. Those aren't in Calc 5.

I was thinking of min-max. You can select an area of cells as a series, and so display numerous min-max lines. Also matrix and contour. Those aren't in Calc 5. Maybe they're in Excel now. I have an old Windows 7 version.