By default, the Client (main monitor and all additional monitors) is displayed in full-screen mode.

It is possible to use window mode both on the main monitor and on additional monitors. Do the following:

  1. Go to Settings → Options (1) → User interface (2).
  2. To use window mode on the main monitor, clear the Full screen on main monitor check box (3).
  3. To use window mode on additional monitors, clear the Full screen on additional monitors check box (4).
  4. Click the Apply button to save changes.

For changes to take effect, quit the Client and start it again.