Choosing the required External displays.
1. Right-click on your desktop and select "Display settings" from the popup menu. In the nav panel on the left, select "Display". At the top of the page, your available monitors will appear as numbered boxes. Each box represents a monitor (e.g., box "1" corresponds with the left monitor and box "2" corresponds with the right monitor).
2. Click the numbered box you wish to be your main display.
3. Scroll to the bottom and check the box that says, "Make this my main display". The other monitor will automatically become the secondary display.
4. Click the "X" in the top right corner to close the page.
When the external monitor is plugged in after launching the Safe Exam Browser/during the exam. The Candidate will not be allowed to use the extended screen during the exam. The solution to this problem is advising the candidate to plug in the External Monitor into the system before launching the exam file.
The Candidate is allowed to use two external screens along with the main screen while accessing the exam.