Welcome you want to change the margins? Package gemoetry. Do you want to change the paper size? Still package geometry :-)
– Johannes_BJan 31 '17 at 17:39
4
I'm voting to close this question as off-topic because it has been solved in comments section.
– CroCoJan 31 '17 at 18:59
beware if you are printing on standard A4 or US letter paper and make the margins small the text lines will be too long to read unless you use (at least) two columns. there is a reason that the default text width is not wider.
– David CarlisleJan 31 '17 at 21:18
gemoetry. Do you want to change the paper size? Still packagegeometry:-) – Johannes_B Jan 31 '17 at 17:39