Under the menu "Options – Notation – Evaluation" you can set the display of the engine output.
Four options are offered: (none), Centipawn, Win probability and Both. Either the probability of winning is displayed with a percentage value or – as usual – numerically in the form of pawn units (Centipawn). The "Both" setting shows both values simultaneously.

Numeric display

Note: not every chess engine supports the output of win probabilities!