4 Control a layer’s degree of wetness
Wet the whole layer to simulate the wet-into-wet technique, as used in classic watercolour techniques. Fast Dry stops the flow of colour and water, but the wet parts stay wet, while Dry the Layer dries everything. You can control which parts of the canvas are wet by pressing H (Show Wet). When you switch layers, the layer mode will change to Fast Dry.
To achieve this effect, use Fast Dry repeatedly while painting. This is how colour runs differently on wet and dry surfaces.
Pause the spread of water You can pause Water Flow to give you more time to think about your next step. Show Wet. Wet the Layer. Dry the Layer. Fast Dry.