T-shaped doors are less common than the rectangular openings, some ruins having many, others very few. The T-door is simply a standard door with the added notch at the bottom. It is a much more convenient door for if the hands are placed on the two ledges it is quite easy to fold the legs and swing through the opening.
No. 3.
Windows are not common in Mesa Verde ruins. When present they are small, often little more than peepholes. Note the door slab leaning against the wall.
No. 4.
Doors were closed with thin sandstone slabs. A small stick set into the masonry under the lintel kept the door slab from falling through.
No. 1.
These small built-in shelves are very common on the inside walls of the rooms. Evidently they were for the storage of household articles.