Using the pre-installed Book Template as an example:
This Template utilizes the Basic Layout, and includes an empty image block by default.
Adding an image there will make your Page beautiful, but it will only be presented in the body of the Page, with the rest of the content.
For the image to be visible in Card or Gallery views:
- add a Cover image.
Then, in your Set under Views:
- View as Gallery
- Enable Page Cover
- Customize other image/icon presentation options to your preference
If you want your Object to have a custom image in the Graph view, you need to upload an Icon.
- Click the icon button in the Header of your Object
- Add an Icon or Upload Image
