How to add windows in a workspace which has no handles? I am using Blender 2.75a, and usually use the handles very often to create a  workspace that is relevant to the models I am creating.



However, I have recently downloaded models that were placed for free on the internet, and I was surprised to see that when opening some models, the windows of Blender (still the same 2.75a version) didn't have handles, which was making it hard to work.



Were they disabled by the person who made these models, or did these handles appear later? In any case, is there a toggle that turns them on/off?
It could be a maximized area.... try pressing Shift+space, Ctrldown, or Ctrl&#8593; Up