The benefit of using a layer group is it's non-destructive so you can continue to work with your separate layers. Defringe: Causes nonfeathered pixels to bleed outward, creating a smooth transition from the selected area to the surrounding area. Matting: When you move a selection, some of the pixels around the edges are also moved. If you do not see it however, you can add. When you open an image in Gimp by default the Layers Dialogue will be open on the right side of the screen. We are going to look at how Gimp's layers and blend modes work. :) Go to the menu Select and choose From path.
Right-click the text-box you just created selected and select Path from text in the context menu (GIMP 2.8, older versions: Go to the text tool box and click 'Create Path from Text') Go to the menu Layer and New Layer. Suitable from 5-year-old child to 80-year-old senior.