I have made a copy of the two relevant slides. If you select Review and then select View Documents, the View documents slide should open as a lightbox and the images have the Zoom feature on them but no zoom happens. If I just preview the lightbox as a "slide" the zoom works.
Out of curiosity I tested in Modern player and the zoom work but the pictures vear off to the left.
We only use the classic player as our organization prefers the menu option on the top left of the player.