M1, M2 … modules from left to right. A, B, C … shelves, with the free height for products at the side (max, in mm: from the top of the tray, or the bottom of the box, to the shelf above). Each cell shows its size and what it holds (for example MM 10 kg). Cell names: shelf letter + position (A1, A2 …). Click a cell to change its weight or remove it.