Using the post editor, you can search for free images from Unsplash and add them directly into your post.
1. Click on the image icon in the editor toolbar and select "Search for an image".
2. Use the search bar to find an image. Click on an image you'd like to use and select "Insert". This will automatically add what you selected into your post.
3. To delete the image, select the three dots in the top right corner. To re-size the image, click on the arrow in the bottom right corner.