Roof windows or skylights can be a wonderful asset in the winter, when light levels can be low or weak. But in the summer they can be more problematic. Historically these always came with blackout fabrics, a popular choice for an attic conversion bedroom.
But for other spaces, this binary on/off treatment can be a little uncompromising and misses the point of having the extra windows in the first place. Instead, choose a covering like Duette® blinds that can block the thermal gain but not the sense of the outside, in a transparent weight. Using the same fabric as the main windows also brings the design theme of the room together more effectively.