Using drag and drop

Slides have “inline” images and one “background image”.

You can add as many inline images as you want by dragging them into the text area of your cards.

Using the Add (+) button

Click the Add (+) button and select Image.

Click the attachment to replace.

By selecting a layout

Select a layout that includes a slide image.

Click the attachment and use Replace... to change it.

Generated using Dall-E

Click the Add (+) button and selecting “Generate Image...”.

Enter a description for your image.

Click “Generate image” and wait a few moments.

And there you have it (usually it generates better filenames).