Add lines to a chart:
http://peltiertech.com/Excel/Charts/AddLine.html

- Jon
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Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
Peltier Technical Services, Inc. - http://PeltierTech.com
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"Kara" wrote in message
...
Hi I am trying to make a chart of patients lab vaules...basically for each
patient I have there date and corresponding lab value making this line
graph
is easy....what I want to do is a vertical line at a particular date that
corresponds to a treatment date...this date more than likely has no lab
value
that corresponds to it.... I think I could do individually by just drawing
a
marker in on the existing line graph ...but with multiple people and
multiple
treatment dates for each patient this could become lengthy ...is there
some
trick I am missing?