How  to tell Vim to re-evaluate the modeline of a file if it's already
 loaded? Simple as that:

                                  :e %

 Just re-open the file. Well, yes.


                          ____________________


 How to resize images to a given size using ImageMagick while  cropping
 exceeding parts? Simple as that:

       convert foo.jpg -resize 1024x600^ -extent 1024x600 bar.jpg