The transfer history page shows the transfers made between sub-accounts.
You can access the transfer history page through the profile menu:
Transfers for the selected sub-account are shown chronologically from most recent to the oldest. The transfer history page details the date/time of the transfer, the asset (e.g., BTC, ETH or USDT) and the amount.
To see transfers for a different sub-account, go to the account menu and change the sub-account in use.