Master Advanced Custom Field?

Hi all, i’m just asking a general query regarding Advanced Custom Fields,
And what I was wondering was, is there a way to use a ACF which then replicates across all pages? So I only need to input the content once, and which will then appear on all pages?
Obviously I would put it in the footer, but I need it to be easily changeable within the wordpress page, so that it will then appear on all pages in the same place etc.

Any help would be appreciated,
thanks!