To allow more stowage for a mini studio flat, there is a kind of design having a convertable compartment built under the bed mattress. The height of this kind of platform could range from 5 inches to 5 feet.
1) What should we name this design?
2) Is there website teaching English for interior design (for home), particularly those terms for furniture settings?
3) Any errors on the following writing?
Today it's her wife's 1st death anniversary.
Tks / ju