Gimp: Add or remove alpha channel

This practical tip shows you how to add or remove an alpha channel in Gimp. You need alpha channels to control the transparency of the layer and to edit layer masks.

Add Alpha Channel at Gimp - control transparency

Open your gimp file. To see the Layers window, go to "Window"> "Dockable Dialogs"> "Layers" in the menu bar.

1. Select the corresponding layer in the layer window.
2. Click on "Layer" in the menu bar.
3. There you select "Transparency" and click on "Add Alpha Channel".
4. If your layer already has an alpha channel, select "Remove alpha channel" here if necessary.