Learn French: Le créateur capricieux change de tissu tout le temps. - The capricious designer changes fabric all the time.

This is a crucial distinction! Using changer de followed by a noun means to switch or replace one thing with another of the same kind. Here, the designer is swapping one fabric for another. If you said change le tissu, it would mean he is physically altering or modifying the original fabric itself.

Why is there no article after de? Why not change du tissu?

When you use the changer de construction to mean to switch, the noun that follows does not take an article. You simply use changer de plus the raw noun. This applies to many everyday situations, such as changing trains (changer de train), changing your mind (changer d'avis), or changing shirts (changer de chemise).

Does tissu need to be plural if he is changing fabrics all the time?

Not usually. In the changer de construction, the noun is generally kept singular because you are swapping one single item for another single item at any given moment. You only make the noun plural if the item naturally comes in pairs or sets, like shoes (changer de chaussures) or glasses (changer de lunettes).

I learned that créateur means creator. Why is it translated as designer here?