You are in the Galleries section
A plan of the quadrangle, floor by floor. Point at a wing to see what is in it, select it to read the gallery and the objects that live there. Roughly 80,000 objects are on display at any one time, across about sixty rooms.
Each sheet carries its own key and its own lettered highlights. Rooms marked with an asterisk open 11.00 to 15.00. Galleries occasionally close at short notice for refurbishment, which can affect step-free routes, so check before you travel if a particular room is the reason for your visit.