It primarily broadcast in areas where Galaxy was not represented on FM, such as London, Leicester, Nottingham, and Derbyshire.
The digital service was broadcast largely from the Galaxy Yorkshire studios, and much of the content networked across the group came from this location.
Since Monday 21 January 2008, Galaxy Digital was changed from its own dedicated service (albeit with mostly network content) to broadcast almost entirely as a direct relay of Galaxy Yorkshire, though the 'Across Yorkshire' on-air tagline was replaced by 'Across the UK' on the digital service.
Galaxy Digital was rolled out to a number of other DAB areas in 2009, following the removal of sister station Chill.
In 2009, Galaxy Digital and Xfm London were added to the South Wales regional DAB multiplex; Galaxy took the place of sister station Choice, which moved to Xfm's previous location on the local Cardiff and Bristol multiplexes.
The areas affected were London, Nottingham, Leicester and South Wales on DAB, and on digital TV platforms.
Following the cessation of the MXR Severn regional multiplex, changes have been made: Capital South Wales remained on the expanded south-east Wales local ensemble (which expanded its coverage following the closure of the regional provision), and also secured carriage on the Swansea/Southwest Wales local multiplex, whilst Bristol, previously provided with Capital London on the regional ensemble, saw the London station added to the local multiplex in place of Choice FM.