I would suggest a little light reading on the forum...starting here:
viewtopic.php?f=8&t=2367
Every printer is different in the way that the print settings need to be set for the best finished print.
If you take a browse through this section of the forum, you'll see many asking for advice on how to tweak settings to prevent one thing or another. Again, have a read....and then if you're still confused or stuck, the do ask for assistance. With the increased knowledge you'll have, you'll find answers much easier to follow...