You have 3 options:
1. Open a candidate profile and go to Summary -> Select talents. You can choose one or more talents for each candidate:
2. Go to Candidates, select candidates from the list and select Add tags and talents from the bar at the top. A widget will appear on the right where you will be able to select talents from the drop-down menu:
3. Go to Candidates -> Talents -> (Talent name) and click Add candidates to talent at the bottom right of the screen.
If the talent you’re looking for is not on the list, you can add it.