There are many option for you to choose
- Select a size : to choose the size in the selection menu.
- Scale : to resize the image size to how many percent of the original size.
- Custom size : to fix the size by fix the width and height (this option will not crop the image).
- Append : to rename the resized image name following with the text in the textfield.
- Resize in place : to replace the resized image with the original image.