You can rotate a page or delete a page by checking the file preview.
Settings
Description
[+]/[-]
Enlarges or reduces the preview image.
[No Zoom]
Displays the preview image in full size.
[180°]
Rotates a selected page 180 degrees.
[Rotate Page]: Rotates multiple pages 180 degrees together. You can select to rotate any page, odd-numbered pages, even-numbered pages, or all pages.