zomborama wrote:

I solved my own problem. I found in this post below that the "gallery_url" slug applies to the Home icon as well as the Gallery Name.

http://piwigo.org/forum/viewtopic.php?id=23475

I added the line below into my local conf file and now the Home icon & Gallery Name both point to http:/www.mysite.com/ and not http://www.mysite.com/piwigo/

$conf['gallery_url'] = '/';

I have the same problem I do not understand where could I find the "my local conf file " ? Please tell me its name and location so I could add the line:
$conf['gallery_url'] = '/';

Many thanks.

I doubt that is a good idea. $conf['gallery_url'] is used in include/functions_url.inc.php function get_gallery_home_url(), which in turn is used in various places expecting the gallery home URL, not some arbitrary page's URL; you may get an impression doing a
grep -r get_gallery_home_url piwigo

A mismatch of get_gallery_home_url() not pointing to or be rewritten to the gallery's page will break some functionality including extensions if they expect the gallery structure at that home URL.