To go to the canvas view, we included
<Require feature="views" />
on ModulePrefs in our application xml. In the profile section, we call this code:
var supported_views = gadgets.views.getSupportedViews();
gadgets.views.requestNavigateTo(supported_views['canvas']);
we also tried
var canvas = new gadgets.views.View('canvas');
gadgets.views.requestNavigateTo(canvas);
Both ways work fine on Firefox, but on IE you can't hit back because the canvas view keeps rendering.