Google Slides and Drawings have been made easier for you to present your images how you want. Slides and Drawings will now let you edit images right within your presentation.
You can crop, mask, and add borders to images without leaving your New School Google Slides/Presentations or Drawings. Just select an image and you'll see this functionality appear in the toolbar, Format menu, and context menu. You can adjust and customize images you have added.
How-to information and details are available on Google's support site and blog.