To use multiple windows in FIMS follow these steps.
  1. Click on Tools > User Preferences
  2. Choose All Other Preferences and click OK
  3. Select the Multiple_Windows option
  4. Change the value to Yes
  5. Restart FIMS
This link (https://www.youtube.com/watch?v=4dBn0LcBd3Q) will show you how to use multiple windows in FIMS.