In the A10C there is a graphic user manual, with interesting chapters about graphic and key setting (UK & ITA manual)
http://www.digitalcombatsimulator.com/en/downloads/documentation/dcs-a-10c_warthog_gui_manual_en/
http://www.digitalcombatsimulator.com/en/downloads/documentation/dcs-a-10c_warthog_gui_manual_it/
I suggest you to visit this forum for a finest overall setting
http://forums.eagle.ru/showthread.php?t=107551
http://forums.eagle.ru/showthread.php?t=88471&highlight=increased+visibility