Place the dough in a lightly greased bowl and cover it.
Leave it to ferment at approximately 24–26°C (75–79°F) until it looks smoother, lighter, and has increased in volume by about 50–70%. Depending on the strength of your starter and the temperature of the room, this usually takes 3–5 hours.
You can give the dough one fold after the first hour if it feels very relaxed, but repeated stretch and folds are not necessary.
Do not wait for the dough to double completely. An enriched dough containing milk, butter, and honey can ferment more slowly than a basic flour-and-water sourdough. Look at the dough itself rather than relying only on the clock.
When bulk fermentation is finished, the dough should feel aerated and slightly springy. Small bubbles may be visible beneath the surface or around the sides of the bowl.