I was just trying to make the image be seamless but I can't seem to remember the correct steps.
Filters -> Map -> Make Seamless
(working nice on simple backgrounds like the sky,..)
Hope it helps.
Thank you! This is exactly what I was looking for!
File -> Layer -> Transparency -> Add Alpha Channel
Select the background you want to delete by pressing Delete, and Export the img.
also click on the background you want to delete when you press layers and delete
Thank you! I'll give this a try!