When it comes to knowing how to resize an image with GIMP, a basic resize is an easy process, as you'd hope. Open up your image in GIMP, click on "Image" along the top menu, then select "Scale Image" ...

GIMP is a great image editor that is free and open source. If you want something that is powerful with a ton of features and plugins, then this is it. Unfortunately, it is not the easiest image editor ...