Yes, you can transfer funds between your Bybit Main Account and Subaccounts:

1. Click on Transfer on the Subaccount page of your Main Account to transfer assets without fees.
2. Alternatively, go to the Assets or Accounts pages to make a transfer between accounts.
3. In the Transfer window, use the Across Subaccount(s) tab to transfer funds. Choose the direction of transfer by clicking on the Switch icon.