Gimp how do i make background transparent

To make the solid background of an image transparent, add an Alpha channel, and use the Magic Wand to select the background. Then, use the Color. Setting Default Transparent Background for New Images · Open your GIMP application by double-clicking on the shortcut or searching it through the. Click and drag the "Opacity" slider at the top of the Layers toolbox to the left to decrease the opacity and increase the transparency. 4. Set the Opacity.