We have added a supplementary explanation regarding the specification of the “Review Later” checkbox on the diagnostic screen.

On the screen where you take the diagnostic test, if you click the “Review Later” checkbox, the tab for the question number will turn orange, so you can use it as a marker to help you review the question later. However, we have received feedback that it is not immediately obvious from the screen how the system behaves when you click this checkbox, so we have added the following supplementary explanation.

Also, the “Submit Answer” button is disabled by default and cannot be pressed, but we have received feedback that it is not intuitive how to make the button active, so we have added supplementary explanatory text near the button.