In most contexts, when a file such as a Word document or PDF is linked in Canvas, a preview button is added alongside the filename, which allows the user to preview the file in-line without downloading the file:

However, this is not the case for file-upload question submissions, which must be downloaded by the grader in order to be viewed in both quizzes:

and New Quizzes.

In order to streamline the process of grading file upload question submissions, Canvas should add the ability to preview file upload attachments in-line in the speedgrader for New/Classic Quizzes.