Excel: setup pages to print 20 rows on each page + enlarge font

I have 2 pages of data.

I want to create a macro to create page breaks every 20 rows.

I've recorded a macro to create manual page breaks every 20 rows, but is there a piece of code that will so this automatically.

Also, I would like the data to be enlarged to fill each page - I don't think there is a tool to do this but perhaps there is some code that will do this?