Optimize images is a tool that will resize all the images in a project to reduce the final size of the generated file.
This facilitates better sharing of PDFs, faster loading of pages and improves the Flipbook loading and animations.
The tool, will examine the image file and if its larger than the size needed for the page, it will resize it to fit.
In some cases, this can reduce the size of the final file over 50%, depending on the number of images in the project.
When you run the tool, it will create a backup of your current project, which will be rename to 'YourProjectName-Backup', should you need to go back to the original.