I am just asking out of curiosity. How large, in kilobytes, is a chart; say,
a 1000-point x-y scatter? I had a large file whose size was halved when the
charts were deleted (actually, they were lost, along with formats and
scenarios, when the file got corrupted; see "story" below).

In my non-expert view, it should not be so large, because the only
information unique to the chart is its position, size, format, and similar
details. The actual data itself is contained in the data-range cells, so
should not have to be repeated in the chart itself. Not only the formulas
but their values, too, are stored in the cells (note the option in manual
calculation mode to calculate cells before saving, which is presumably always
done in the automatic mode). This being the case, what is the bulk of a
chart's memory size?

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