It’s now possible to group images when memorizing.
Click Preferences on the Train Images or Compete page to set your preference. You can choose up to 5 images at a time - the images get a little smaller if you have groups of 4 or 5 so they’ll fit on the screen.
If you want, you can even use a combination of group sizes. For example, if you enter ‘3 3 2’ as your Groups preference (without the quotes), you’ll get two groups of 3, followed by one group of 2, repeating until you reach the end of the images.