Until now, to add a personal message in the footer, we recommended to use the plugin LMT (license manager on your photos) because it features such an option. This plugin is very powerful and complete, so it might seem excessive for such a simple need. Now and for this specific purpose, we recommend instead plugin Perso Footer, whose sole mission is to add a message in the footer.
Perso Footer is compatible with all themes. The most frequent message we encounter looks like “Photos are copyrighted, ask before any use” but this is free text, you decide what you write.
Simple task = simple use: once plugin Perso Footer is activated on screen [Administration > Plugins > Manage], submit your text on screen [Administration > Plugins > Perso Footer] and you’re done.