To 'Add a segmentation' go to 'Manage Database Structure' ( Catalog> Profiles > Manage DB Structure)
There is a difference between 'Creating a segmentation' and 'Adding a contact to a segment':
By 'Creating a segment', you will create the structure to collect the information.
By 'Adding a contact to a segment', you will determine that a profile belongs to a segment.
A. Choosing a table for edition
Select the profile table to which you want to add a segmentation.
Next, click on the 'Update' button.
B. Adding a segmentation
You will access the structure of the table to which you want to add a segmentation: to do so, select the 'Segmentations' tab and click on 'Add'.
C. Adding a profile to a segment
After the creation of your segmentation, there are several options to specify that a profile belongs to a segment: