The Project Explorer is the control center for your Help & Manual projects. It displays the structure of your project with the Table of Contents (TOC), all your topic files (including those not in the TOC), additional files associated with your project (Baggage Files) and all the configuration settings saved with your project (Configuration).

You can open multiple projects at the same time – each project has its own full entry in the Project Explorer. Working in the Project Explorer you can copy and paste single and multiple topics and chapters both within your project and between different projects. To make this easier you can split the Explorer to display projects and sections of projects in their own "panes", and you can undock the individual panes into separate windows.