We click on the "Edit" button of the price that we want to change.
In the next window we will click on "Prices" in the menu on the left to see a list of preices we already have. We also have the option to create a new price by clicking on the "New" button or modify any of the existing ones with the "Edit" button.
In the next window we can choose in which days and in which time slot a certain price applies. If we do not fill in the first time slot, the price will apply from the opening time. If we do not fill in the second time slot, the price will apply until closing time.
In this way we can have different prices depending on days of the week or slots. For example make a cheaper rate on Mondays, Wednesdays and Fridays in the time zone from 14h to 16h.