How do I change the layer height or resolution of a 3D print in Slic3r?

The layer height of a 3D print is also known as the resolution, the smaller the layer height, the finer the resolution and less noticeble the layers become.


This is a companion discussion topic for the original entry at http://reprage.com/post/42571777576/how-do-i-change-the-layer-height-or-resolution-of-a-3d