If you know that you are referring to the previously-viewed slide at some point during your presentation, it may be useful to insert a link pointing to the slide for quick access. Here's how to set it up.
Linking to Another Slide in the Same Presentation
Open your presentation and navigate to the slide that will contain the hyperlink.
Next, highlight the text, object, shape, or image you want to attach to the link ] link in links group ” width=”218″ height=”130″/>
In the Insert Hyperlink window that opens, select "Place in This Document" on the "Link To" list on the left.
On the right, under the
The four options at the top of the list let you select the first or last slide in the presentation the link.
If you need to move to a different slide, expand the "Slide Titles" category. This is a list of all the slides in your document. If a slide has a title, the list shows the title. If you have a title, the list shows it as something like "Slide 7."
A preview of the selected slide will appear in the window to the right. When you're finished, click "OK" and PowerPoint wants to insert your link.
As a matter of good practice, double-check to make sure the link is working properly. To test the link in the regular slide editing view, Ctrl-click the linked object. To test the link when playing your presentation, you do not have to hold the Ctrl key; just click the linked object.
Using the Zoom Feature  If you're using PowerPoint for Office 365 or PowerPoint 2019, then you can take advantage of the new "Zoom" feature, which lets you seamlessly transition to any slide in the presentation by placing it inside another slide.
First, go to the slide.
After the slide is inserted, a new "Format" tab will appear. Click it.
In the "Zoom Options" group, check the box next to "Zoom Transition." You're ready to set the duration of the transition, with 01.00 being the default.
Now you can take a look at what happens when you click that slide during our presentation above GIF, clicking the "Introduction" slide that we put inside our "Information" transitions back to the "Introduction" slide. Clicking again brings back to the original "Information" slide.