corel draw , photoshop , illusteratore etc are for editing & file making ...all you need to make printable file from them based on which file format which your printer support.
from corel draw u can Export file as tiff & jpeg format(highly supported format with all printer). short key ctrl+E..
photoshop ...u can save as tiff & jpeg form psd....
illustrator .....export needed...
for frontlit flex even lowress file also get printed coz flex is hazy type ...low DPI merge in it