This page demonstrates the custom image sizes that can be enabled and configured under the Image Settings section in Global Site Settings.

These custom image sizes are then created automatically when you upload the original version and are available to be inserted through the Image Manager as normal by choosing the appropriate size from the Insert menu.

Original (width 938px)

Ocean Sunset - Original Version

Medium (width 600px)

Ocean Sunset - Medium Version

Small (width 400px)

Ocean Sunset - Small Version

Thumbnail (width 200px)

Ocean Sunset - Thumbnail Version