Steps 1:
Navigate to System Administrator responsibility -> Profile -> System ->
Enter profile name: Utilities:Diagnostics
Enter Application User for whom you want to enable Diagnostics-> Examine
Steps 2:
Entry Yes at User level and Save the Changes
Note :–
Don't set Yes at Site level. (if you want to enable this option for all Oracle application users)
Steps 3:
Again navigate to System Administrator responsibility -> Profile -> System ->
Enter profile name: Hide Diagnostics menu entry
Enter Application User for whom you do not want to hide Diagnostics menu entry
Note :–
Don't change value at Site level.