I have around 20 columns in excel which I'd like to print. It'll be in landscape mode. However it wouldn't be able to fit into an a4 size, is it possible to squeeze it in somehow pike having a row in excel show up 2 rows on paper or something?
If you go to file > print there are options around scaling and custom margins. Adjust the margins as necessary and then select the option to fit all columns on one page. Note: this is assuming you are on Excel 2010. I think the same option exists in earlier versions, but may be located somewhere else