A digital printing apparatus using liquid toner including a carrier liquid, a dispersing agent and imaging particles. The apparatus includes a first image forming unit for a first colour; a second image forming unit for a second colour, and a substrate support assembly for supporting the substrate during the subsequent transfer of first and second liquid toner from the first and second image forming unit to the substrate. The second image forming unit is arranged downstream of the first image forming unit along the substrate support assembly. The first image forming unit and the substrate support assembly are arranged such that the substrate is compressed in a first nip between the first image forming unit and the substrate support assembly. A control mechanism adjusts the first and/or second pattern to compensate for the increased width of the substrate downstream of the first image forming unit.