Sentence:  Because of his brain injury and the extreme damage suffered to his sight , the patient had to train himself for a new line of work , that of a <WSD>portfolio</WSD> maker , an occupation requiring a great deal of precision in the making of measurements and a fairly well developed sense of form and contour . 
Meaning of the word marked with <WSD> tags:  a large, flat, thin case for carrying loose papers or drawings or maps; usually leather