Use the change event to detect the change in the cell and then do the VBA
equivalent to what you describe doing manually in your post.

Information on events
http://www.cpearson.com/excel/events.htm
and numerous posts in this newsgroup.
http://tinyurl.com/ypof8t for some examples

to get code on changing the axis, turn on the macro recorder while you do it
manually. Turn off the macro recorder and study the code recorded.

--
Regards,
Tom Ogilvy


"Jo" wrote:

Hi everyone,

Say you have xy graph with (0,0) as its origin. Of course you can make
the origin has any non-zero value by clicking the x axis and chaging
the value from 0 to, say, 5. Same thing to y axis by clicking on it.

If I have to make the origin value change frequently, is there a way
to do so from a cell?

Thanks,
Jo