Geeks on Tour tutorial video #473. If your photos are in Google Photos, using the same account as the Google account you use for Blogger, then it is a very simple matter to add any of those photos to your blog. This video shows you how to add your photos from Google Photos to your blog.
On an iPhone you may notice that the pictures you take don’t fill the screen. This video shows you how to use Google Photos to crop the picture and properly fill the screen. See accompanying article at LearnGooglePhotos.com.