Field Editor: Added "crop" feature for upload field's thumbnail images
Zicky, I believe the image 'crop' feature became available as of version 3.06.
To activate the cropping, you would tick the "crop" checkbox in the upload settings for a thumbnail, as per the attached screenshot.
Instructions in the CMS explain, "If cropped, the images are resized to fill up the selected width and height."
This feature performs the crop/fill on-the-fly during the upload and does not allow manipulation of the cropped region by the person uploading. If find it useful when displaying small thumbnails as in a news list page.