You can compare files that are stored in the same folder in a project or a library or in the same task.
Side-by-Side view:
The viewing area is split into three sections. The left and middle sections contain the images to compare, and the right section contains the comparison image.
If the file that you opened has multiple revisions, the most recent revision of the file automatically appears in the left section and the next most recent revision of the file automatically appears in the middle section
If the file that you opened is a page in a multipage file, the first page of the file automatically appears in the left section and the next page of the file (from the Elements in Session window) automatically appears in the middle section.
Stacked view:
The viewing area is split into three sections. The top and middle sections contain the images to compare, and the bottom section contains the comparison image.
If the file that you opened is a page in a multipage file, the first page of the file automatically appears in the top section and the next page of the file (from the Files pane) automatically appears in the middle section.