change permissions to copy pictures into backgrounds

[Thomas Blasejewicz]

(2012/05/06 0:26), compdoc wrote:
>> What is the try, that will allow me to do so?
> Not sure I followed everything you were saying, but if you need to copy or
> modify system files, (or root owed files) type into a term window: gksu
> nautilus&
>
> Also useful:  gksu gedit&
>
> The '&' allows the process to run in the background, although Nautilus does
> not let go of the term window.
>
>
I am sorry, but I don't understand what that "gksu gedit &" means.
Yet, I still would like to know the trick necessary to copy a few extra 
pictures into the "backgrounds" folder.
The screen tells me, I am not the "owner" and thus have not the 
permission to do so.

Well, I AM the owner of the computer, its one and only user = 
adminstrator rights and the owner of the pictures in questions.
And I refuse to believe, that copying a few pictures will endanger the 
entire system and cannot be allowed.

So, if there is a trick to copy my pictures into the (my) backgrounds 
folder -  I would like to know.
If not ... strange, very strange!