EurodicAutom

EurodicAutom
Espero te sirva *

I´ve searched high and low and have come out empty handed.
They must be talking about reference or research material.

background-fondo, historial, antecedentes,educación, pasado,cualidades, requisitos,experiencia, origen, ambiente, medio.

Material de referencia,
material de investigación
material de desarrollo
material de estudio
material de conocimiento

Hope this helps,

Bye

I suppose it should be "de fondo", because it is dealing with a graphic program, but perhaps it would be necessary some more context to give a appropiate translation.

por ej., fondos de pantalla. Hay programas que vienen con fondos preparados (como los *.bmp que se eligen como papel tapiz en Windows).

suerte, depende del contexto