The "Device Registers" subsection in ch. 12 says:
A so-called “combined” or “split” transaction might consist of a write to the target followed by an immediate read back from the target, as shown in the diagram above. Typically, device registers are read in this way: the device register address is written and then the current device register value is immediately read back.
But there's no "diagram above" that may be related to the subject of that paragraph. The diagram at the beginning of the page serves more of a general I2C protocol exchange and parties' explanation.