Oh, you made my day!

 I just found the Height and Width options for graph size:

Thank you so much. You have simplified my life.

 

Truth be told, the height and width fields might have been there for weeks, dunno. I only just noticed em now. Looks good, too.

Oh!

I just got a message that FREDGraph left a line off my graph and I might want to uncheck the LogScale option.

Thank you!