Currently, media block can be used to display images. Whether a photo from unsplash library, or uploaded from your computer.
In this document, you'll learn how to
Insert a new photo block, then choose a photo from the library
You can insert an image similar to other elements.
You can style a text block through Toolbar, or Styles panel. Similar to styling any other elements, those options allow you to update font, style, colors, padding margin and more.
Besides, you can resize (height/width) by move your mouse to each corner of the photo. Then click and drag the resize handler.
Now, you know how to add and style a media block.