How to Rename Data Series title Automatically Not Manually On MS Excel

Level 16
Joined
May 2, 2011
Messages
1,306
Hello guys,
I have question in the image below

howtorenameseries-png.343638


If I wanted to automatically change Series Name
instead of Series 1, series 2, series 3
to
25, 50, 100, etc, as in the top row (above the data)

how do I do that?

on Microsoft site, I only saw how to change the title of each series manually.
 
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