Changing Theme Banner/Images

[Plodder]

Greetings, I'm pretty new to websites and enjoying Get-Simple CMS - regards theme images - how do I change them please, is there a plug-in that will let me do it or do I need to go in and replace the default coding that came with the theme?

I've seen on other CMS's where you click say an "edit" feature to replace a banner image - is that possible with Get-Simple? (I try to stay away from too much actual coding related stuff, if possible)

Thanks in advance.