Side-by-side approval is a very handy feature in ApprovalMax, which allows opening a request and its attachment side-by-side: you'll see both the attachment and the request at the same time. Just click on the attachment in the request at hand:
You can easily switch between the full-screen and side-by-side view by selecting the respective one:
Note: It is recommended to open requests for approval in “Open requests” / “Decision required” section. If the request is opened from the “All requests” section and the next request is not waiting for user's approval, it won't be opened in side-by-side mode.