Using the Clocks... dialogue from the Games menu, the current time settings can be changed.

During a Computer-Chess tournament, some time gets lost due to the fact that the operator must perform the moves as well as other handling. To compensate for this lost time, it is necessary and allowed to adjust the Clocks. Also, in some situations, the tournament organization has the right to set Clocks. Usually the values provided by a mechanical Chess-Clock may be copied into the electronic Clock.

The dialogue continuously shows the updated Clocks in the right-hand-side boxes when the game is not paused. New values can be entered in other edit-fields.
In tournament levels, the time displayed is the time left to play. In other cases it reflects the time played so far!