To set up merged series name, go to the Parameters tab in the Data Series Format dialog box. The setting is available only for the merged series of the primary chart (for the secondary histogram and secondary pie chart).
NOTE. Merged series name can be set up using the Data Series Format dialog box only in the desktop application.
TIP. To quickly set up series format, use the Data Series tab of the side panel.
Enter a new name of the merged series in the edit box.
See also:
Data Series | Setting Up General Chart Parameters | Setting Up Chart Components