From Edit trend, select Series > .
- From the Select data points dialog, do one of the following:
- To add data points to the trend:
a. From the Available section, select the checkboxes next to the data points you want to add.
b. Select to move them to the Selected section.
- To remove data points from the trend:
a. From the Selected section, select the checkboxes next to the data point you want to remove from the trend.
b. Select to move the data point to the Available section.
- Select Confirm.