The manual says: "Excel makes adding a trend line to a chart quite simple.
Select Chart = Add

Trendline to display the Add Trendline dialog box."

But I can't find the correct entry point. What I discovered from Excel
Standard Toolbar: Insert = Chart = Chart Wizard - Step 1 of 4. Even
though I went through all the 4 steps I couldn't find the [Add Trendline]
button. Certainly somebody out here can help me to solve such simple
problem. Thanks!