Once you select an image to open it will appear inside Lunapic.

If you look on the top menu you will find various commands. The sidebar menu also has some editing tools. It's from here that we will use the Paint Bucket command to create a transparent background.

Some images may already have the extension PNG but that doesn't mean they are transparent. You will also find that some have shading (like image above) so you won't get a perfect background but it will be good enough.

On the next page we will start the editing.