There are a few different types of coffee makers, and each type has its own unique markings. For example, drip coffee makers typically have a water level indicator, so you can see how much water is in the reservoir. Some also have a timer, so you can set it to brew coffee at a specific time. French press coffee makers usually have markings for the amount of water and coffee grounds that you should use. And espresso machines typically have a pressure gauge that lets you know if the machine is operating at the correct pressure.