I am trying to use augustus to do gene prediction, but the input file I have is in gff3 format. I am trying to convert gff3 files into genbank format using the script gff2gbSmallDNA.pl shipped with augustus. However, I don't know how to choose one of the parameter - max size of gene flanking DNA and it doesn't have a default value. Therefore, I somewhat get stuck. Can someone help me this? Thanks.