Bb Test Timer Bar can be partially blocked by browser add-ons
Blackboard's Test Timer/Question Completion Status Bar
When a student is taking a timed test in Blackboard, the system displays the timer with the Question Completion Status bar, locked at the top of the browser's page. It covers part of the top-frame banner image, but it does not interfere with the display of the questions and answers on the test.
Some users have installed other toolbars in their browsers, hanging below the usual address bar, and those additional toolbars can cover the screen space used for the test timer, as in this example:
The solution depends on which additional toolbars have been installed by the user. The extra toolbars must be closed or shifted to different screen locations to let the Blackboard timer bar appear as it should.