To edit a previous "Find People" search, click on the source column in your People table. This allows you to modify your search parameters.
When you edit the source, it won't update existing results automatically. To see your updated results, you'll need to re-run the step that generated the data. You can either delete and re-run the step or duplicate the table with the updated source.
The edited search won't remove your previously added contacts but will append new ones based on your updated filters.