I have a deep kitchen window, approx. 16" deep similar to a garden window. Can I put some type of a window treatment up and would I position the curtain on the wall or in close to the window. Question 2, I have a doorwall with a daylight window above it, would I put a treatment on it as well?
Thanks so much

This is a matter of personal preference. And of course the look of the window. I suggest you visit a store that specializes in window treatments.

Generally, we don't put treatments on transoms above doors--unless there is a specific reason to do so (to block light coming into a bedroom, privacy issues, etc.). Because the windows are so small, there aren't as many options for these types of windows. So unless there is a problem with the window, it is generally better to ignore it. If it was a transom above a window, then the answer would be different. But doors don't give much surface area, and you have to be concerned with the door being operable--therefore, dressing the transom window runs the risk of making the window look short and squatty.

If you still want to dress the transom, the safest bet is a gathered sheer on double rods (top and bottom), which will filter light, but not be too obtrusive.

The kitchen window can be treated in several ways, depending on the space around the window, size of the window, etc. You can frame the window with the treatment by moutning it close to the outside of the window... or you can insert the treatment inside the window (if there are walls instead of glass on the sides)... or you can go way beyond the boundaries of the window with raised casual swag or other treatment. It all depends on the style of the room and the treament chosen and other factors. It is really hard to answer what would be best without seeing a photo of the window, in the context of the overall room.

One tip to help decide what style to put on the window is to take a digital pic of the wall that the window is on. Then you can print out the photo to full-page size and draw directly on the picture. If you are good with photo editing software, you can take window treatment pics found online and drop them into the photo of your window.

(p.s. I teach window treatment design and fabrication.)

You might want to look into some shutters for the kitchen window. You can open the louvers of the individual shutters without having to open the shutters themselves. This way you can avoid any cloth curtains.

The door with the transom window can be treated with some of that opaque paper if you like also. It comes in designs and can be very decorative and still let light in.

Stained glass is actually a good addition to a transom. I have done a couple of them for clients over the years. I am a stained glass artisan.