Ok I'll try again, then give up on this thread, I am just asking how to change the dimensions of the image cropping tool, UNDERSTAND that when I load an image I am forced to to use this function when using the header customiser option in twentythirteen theme but it is not allowing me to grab the full aspect of the image, i need to be able to crop more area. All I wish to know is how to change the dimensions of this FUNCTION ..... i really cant be any clearer than that. Yes i can change images sizes before using the appearance/header/customiser ...... I wish to upload a number of images to rotate in the header but AS ALREADY MENTIONED i need to be able to make the cropping tool dimensions a little larger......... so if you can tell me where to make these changes, that is great if not then i'll say thanks for help up to this point. But no need to be sending me elsewhere, the photo imager Tim offered is fine IT IS THE CUSTOMISER dimensions that I need to adjust and if something goes wrong then i'll change it back. Cheers!