The best answer is usually a roof window set at one side of the desk and higher up the slope than you might expect. Daylight then arrives across the work surface, and the glass is out of your direct sightline. If the desk is under the low eaves, the window can sit above and behind the seat, with the light bouncing off the sloping ceiling. We mark positions on the floor with tape at the survey and you sit at the desk while we look up, because a chair in the right place tells us more than a drawing.
Next comes the question of heat. A south-facing slope will warm a loft quickly on a clear afternoon. A solar blind running on the outside, or glass with a solar coating, is worth discussing before the unit is ordered. Ventilation matters too. Hot air collects at the ridge, and a window you can open at the top lets it out while a cooler air supply enters elsewhere.
None of this needs a large window. A well-placed unit of ordinary size does more than an oversized one in the wrong spot.
Wiring is the last thing to plan. A desk needs sockets for a laptop, a lamp and a charger, and an electric opener needs its own supply. If the window is to be motorised, the cable is routed through the roof space to a switch near the door or to a small solar panel on the glass, so nothing trails across the floor. We note where the sockets are on the survey sheet, because a cable that runs the wrong way spoils a tidy ceiling. A rain sensor can close an electric window by itself if a shower comes while you are in a video call, and it removes one more thing to think about during the working day.
A desk wants daylight from the side, not a bright window in front of the screen.
