Slide zoom
Slide zoom allows you to link to another slide containing more information about a subject.As opposed to Summary Zoom and Section Zoom there are no sections in play when you use slide zoom.
Please take into account that after the zoom PPT will not return to the original slide you put the thumbnail on.
Select Insert - Links group - click Zoom button - choose Slide zoom, select the slide(s) you want to link to and click Insert. The slide is inserted as a thumbnail, which you can adapt in size position and look.
As an alternative you can drag the target slide from the thumbnail view onto the original slide.
If you use the slide zoom to navigate/link to a slide that is further up in the presentation you automatically skip a few slides from your presentation. You can change that and return to the original slide by using the Zoom tools.
Put a check next to Return to zoom. After returning and continuing the show you will eventually come to the slide you previously linked to.
If you do not want to show the target slide a second time you can hide the slide. Right-click that slide and choose Hide slide.
Summarize