Need help (UV image)

I am working on a project for school and I am new to blender. i have to design a pop can but I am having problems with the UV image. Is there any way when i load my image to shrink it at all? or bring the UV image into photo shop so i can work on it or save it? because at the moment its just looping and looking horrible =( thx. About as best i can discribe it if need more detail let me know thx again

For sure there is a way to edit your UV-Image in an external program.
You can also export the UV-Outline to an image.

Could you show your current progress? Or the blend file?

OMG thank you so much after your post i did a little digging and found it. Thank you so much <3