On the editor, click Library and proceed to Media.

First, click the Images tab.

Then, click the upload your own button to upload an image from your Computer and It will be automatically added to the Library.

You can also import images from a URL or third-party integrations like Pixabay or Pexels.

If you don't like the image, you can click the (-) icon to delete it.

Use the guide below as a reference.