Increasing font in Excel when printing

if you are scaling to be 1 page wide (fit all columns to 1 page) then you have to 'play' with minimizing the margins (I'm guessing you already did) and changing the column widths. For example if you have a column named "ID" and it has only a couple characters in it then make that column as narrow as possible. Also let's same you have a column titled "Data Entry Date" but all the dates are short format, then maybe make the title shorter and narrow the column or maybe use word wrap for the title. Similar could be a column with Names (first and last) and you could 1/2 the width and have all the names word wrap onto 2 lines.
just a few ideas to get you started. good luck.