Newbie question (file location)

I'm a very basic user of grav and starting to edit my first page. I'm using the default theme (antimatter) and I can edit the "default.md" page stored in user\pages\01.home with no problems (markdown is really great). But I need also to add a logo to the top header and modify the footer... Were they are located?

Thanks
JB

Hi, i think you have to edit the base.html.twig @ user hemes\antimatter emplates\partials

Tks. It worked :)