You can select the questions you wish to attempt from the top menu and move from one question to the next at your own pace. You can also use Next and Back buttons to navigate on questions swiftly or alternatively you can use your keyboard's cursor < > keys to navigate.
Click on to abort the test.
Click on to move on to the next stage or finish the test to get a feedback report on your scores.
Click on if you need help during the test
Click on on the bottom right of the screen to proceed to the next question.