On the left-hand side of the Opus editor is the Organiser. This allows you to view your currently opened publications in different ways:

The Organiser contains several tabs down the left-side of the panel. These tabs show:

Objects – all the objects that make up your publication.

Actions – all objects in a publication that have had actions added to them.

Pages – a thumbnail view of all the pages in the currently selected publication.

Components – galleries of resources that you can add to a page.

Script – a handy index of all the OpusScript functions you can add to a Script Object or Script Action.