As per documentation and following link
I have enabled Proctored Exams and Timed exams from studio and I have also set ENABLE_SPECIAL_EXAMS to true in
And restarted studio and lms after that.
But it is not showing option to select timed exam in advance tab.
In advanced tab It is only showing
Use as a Prerequisite
Make this subsection available as a prerequisite to other content
Can anyone please help me to solve this problem ?