The screen shot below is the Ribbon/Options Bar after initiating the Section tool….notice anything missing?
What used to be in the Options Bar is now gone….the ability to “set” the scale of the View you are about to create. In 2013, you have to basically just create the Section, Elevation or Callout, then once the view is created change the scale.
Not sure the reasoning behind this one, but it’s kind-of annoying that you can’t set the scale prior to placing/creating the View.