The only way that I could increase the font print size was to go to print
settings, daily style, format and change the "Print from:" to 8:00 a.m.
and the "Print to to:" 7:00 p.m. I think the default is 7:00 a.m. to 9:00
p.m. That reduced the print time ranges for appointment times, but I only
had appointments from 8 a.m. to 6 p.m anyway. If you have more
appointments, you will need to extend the time range which will reduce the
font print size. I found this out through trial and error. Don't know
why Microsoft hasn't fixed this problem.