I was once an expert, guru even, helped everybody. Now I can't even find the
help menu. So very frustrating.

I have a graph and need to add a trendline. The graph is embedded in a
worksheet sitting alongside four other graphs that have trendlines i created
with Excel 2003. Trendline is no longer a simple check box on a screen that
i can get to. I see it on one of the menus, Trendline, all nice and pretty
grey. There's no help on trendline using F1 key, other than giving the
formulas. On-line I find instructions on how to add a trendline, duh, and
the trendline option is grey. Would anyone mind trying to assess how I've
become so incompetent so quickly, and tell me what I'm doing wrong?