Merge can be done on Search Results or on Identification Summaries. See description for Search Results merging and Identification Summaries merging

To merge a dataset with multiple Search Results:

- Select the parent dataset

- Right Click to display the popup

- Click on “Merge” menu

When the merge is finished, the dataset is displayed with a M in the blue part of the icon, indicating that the Merge has been done at a Search Result level.

If you merge a dataset containing Identification Summaries. The merge is done on a Identification Summary level. Therefore the dataset is displayed with a M in the orange part of the icon.