A bench is not furniture. It is a tool with two jobs: to hold work still, and to give a flat reference the work can be measured against. Everything else about it, the drawers, the shelf, the pegboard, is storage that happens to be attached. That is why the bench built here in July starts from a chalk line round an open car door rather than from a cutting list, and why the top is plywood rather than laminated beech: in an unheated garage a solid top cups, and a top that has cupped is no longer a reference for anything.
The second half of the section is about what happens to tools between jobs. Most of the sharpening a home bench does is caused by storage rather than by cutting, and a strip of softwood with slots in it will halve it, which is the argument in the entry on storing chisels. Heights are given for a person of average build and should be adjusted by standing at the bench with your arms hanging; measurements are millimetres throughout, and the rest of the conventions this notebook holds to are listed in about the bench.