Bygg en funktion i Open Cart

Hi, We need some help with... 1) Is it possible to crop an image in open cart? We want the customer to be able after uploading the image, to see a frame that is for example 5906x10039 (50x85 cm) and then move the frame or the image so you can choose where to crop the image. It would be nice if the customer also could choose to increase or decrease the image. 2) Change our “head” (logo) we want it to be as long as the "meny". Thanks! //Camilla and Åsa