To enable Joined Format as a formatting option in LCRM you will need to:
  1. Go to Setup.
  2. Select App Setup.
  3. Select Customize and choose Reports & Dashboards.
  4. Once here select User Interface.
  5. You will have an option to enable a Report Builder Upgrade.
Once this has been upgraded you will have an option to select the Joined Format when customizing a report.