What do you understand by the word "controls"?
If these are indicators above characters, then they are activated using special items and/or skills.
In short, additional information about the battle can be obtained first with the help of special artifacts that need to be placed in Celica’s small inventory (located under the health and magic indicator and containing only 3 cells), and after studying it, you can simply activate it in the skill settings.
More information about this can be found in the Agranor library (located not far from Celica’s house), in the book about skills.