Apply correct orientation for rotated images rotates the images in the size preset in the Application Designer.
The image Maximal size can also be set here. Specify the Width and Height of the image in pixels. Larger images will then be proportionally reduced in size, while smaller images will remain unchanged.
Crop image adjusts the width and height of the image for the element surrounding it. If the setting to Enlarge smaller images is selected as well, smaller images are enlarged to the preset maximum size.
Optimize file for thumbnails causes the file size to be reduced in order to speed up loading the application page.