How to set avatar for snap?

Do I set the avatar for a snap when making it or can I do that once the snap is published?

You can specify the icon in your snapcraft.yaml with icon: path/to/icon.png. Put this directly underneath summary and description with the same indentation (none). This will set your store entry to use the icon unless you’ve previously configured your store entry via the website admin screen.

Cheers, so once the snap is in the store you can also configure it via the website admin screen? I will do it with the snapcraft.yaml file anyway… Just waiting for a change in my username to propagate from launchpad…