You can find the places where you have used a central test data set from within the Central Test Data Editor:
Select the central data set you want to search for and select:
from the context-sensitive menu. You can also press »F7« to show the places where the data set has been used.
All the places where you have used this data set in this Project will be shown in the ”Search Result View” (Section 3.30.7, “Using the search result view”).
If you want to change the Test Cases that use this central test data set so that they use a different column from the data set, then you can start this action from the Search Result View (Section 3.14.9.7, “Changing the column used in a central test data set for multiple Test Cases”).