Hi,

You can not format multiple series at the same time. You can however
make use of the F4 button.
Format the line width for 1 series. Select another series and press F4.

Cheers
Andy

Minsu wrote:
I'm trying to format multiple data series in an Excel chart, and it would
save me considerable amounts of time if I could eg. set the line width for
all series at once. I can't figure out how to select multiple series. Has
anyone got a solution?

Minsu

--

Andy Pope, Microsoft MVP - Excel
http://www.andypope.info