You can add widgets to any view you can edit. You can tell that you can edit a view when you can see the config gear in the top left hand corner of the widgets. If you do not see the gear, make a new view and then you can edit the widgets and their settings.
Once you can edit your view, you can drag new widgets onto the view by accessing the Widget Gallery.
Select your widget from the Gallery and drag it to where you want it on the page:
When you drag a widget from the gallery to the view, shaded yellow drop zones will appear where you can place the widget: