This idea has been developed and deployed to Canvas
When students are taking a Quiz or Test through Canvas, there is a running timer that stays at the top throughout the test. Many students have recommended this timer follow them as they scroll down to each question for them to more easily see how much time is remaining. This is especially helpful for tests that have essay questions, or are for an extended period of time where they will need to pace themselves with each question.
Comments from Instructure
This idea was completed with general availability of Quizzes.Next. You can find more information about the overall project in the Quizzes.Next User Group.
Quizzes.Next is now available for all paid accounts.
Quizzes.Next updates will be included in the Canvas Release Notes.This includes new features, updated features, and relevant fixed bugs. New and updated features will be deployed to Quizzes.Next near the same time as the Canvas release. Fixed bugs may be deployed at any time.