Understand layer management and apply it to create a reflection effect.
Intro to Layers concept

Layers in GIMP allow you to stack images on top of each other independently, much like stacking sheets of transparent glass.
You can control and view all your layers by making the Layer palette visible from the menu: Windows > Dockable Dialogs > Layers.
Step sequence for reflecting an image.
Adding a reflection gives your images a professional, polished look. Let's walk through the exact steps to create a water-like reflection using Layers and the Blend Tool.
Flowchart of reflection steps.

65% for a fading reflection effect.Summary of Duplicate, Mask, and Merge.
A quick summary of Duplicate, Mask, and Merge.
Ordering exercise for creating a reflection.
Drag the steps into the correct chronological order to create a reflection effect in GIMP.