In this video I demonstrate the difference between the concepts of canvas, layers, and the overall image in GIMP. I also show you how to resize each of these aspects of an image in the software.
Concepts demonstrated:
1) What an "image" in GIMP consists of and how to resize it
2) Layers of pixel data in GIMP and how these can be resized in the software
3) What the canvas is in GIMP and how you can resize it to make your own compositions from other images.