Create and delete additional image sizes for your WordPress site/blog as well as resize the predefined WordPress sizes.
First use with no custom image sizes created. Menu item added to Media.
Just after adding our first additional custom image size
Settings for creating new/missing image sizes
Settings for deleting images for deleted sizes
Message output showing progress of creating new sizes (or simulating in this case)
Message output showing the images deleted that time around
Inserting new image sizes into post/page/custom