What aspect? The only real things you can change, at least as of this writing, are the look and feel of the widget, error pages, the end-user dashboard layout, email and SMS notification templates, and other aspects of branding (logo, colors, etc)
Thanks for the reply. My question is can we change the entire layout of the UI using any frameworks or something.
I figured out that we can customize the Error pages etc and all. but what I am expecting is the customisations other than widgets, error pages, email, and SMS logo branding.