All examples that I have found so far explain how to render ExtJS (4.2) MVC application within the \"viewport\", which in other words means full browser screen, and occupying wh
A viewport is just a specialized Ext.container.Container that auto sizes to the the document body.
Ext.container.Container
As such, you can easily create your own in the launch method:
launch: function(){ new MyContainer({ renderTo: 'myDiv' }); }