Hi Sharon,
Thanks for reaching out!
We currently have a feature request logged for a magnifying glass effect so this is still on our radar. I'll be sure to add your comments and update you with any news should this make it onto our feature roadmap.
Alternatively, you can use the Zoom Picture feature so learners can zoom in on an image.
- Select an image on your slide.
- Navigate to the Format ribbon and select Zoom Picture
Here's an example of what it can look like. Please like me know if you have any questions and I'll be happy to help!