Instead of creating new, you can also modify images already placed on slides. Double-click the image and select Edit Generation, or click the Edit button in the Properties Window.
Because the image currently visible on screen is used as a reference, the resulting image changes only as much as the description you entered, rather than being regenerated from scratch. Just write down only the parts you want to change, like "make the background night" or "change to winter scenery with the same composition".
This can be used not only for AI-generated images but also for uploaded photos or stock images. It is especially useful when you like the composition of a stock photo but only the color or atmosphere is slightly off.
The original is not overwritten; the result is added as a new item, and AI credits are used for generation. If you want to generate a new image from scratch on a blank slide without any reference, choose Generate with AI instead of Edit Generation.
When modifying photos containing people or trademarks, please refer to the AI Image Copyright guide for important considerations.