drchantry

I have images that i want to crop so i can not have the background, so i can place the images onto a different background. How can this be achieved please as the crop and such like features are not accessable until it knows what to crop. I have looked into this and i am fidning it difficult to see how i can achieve this. If someone could please be an expert or at least think they are in this program so i can carry moving forward with my project.