Before using eXo IDE, you should familiarize yourself with the application interface:

eXo IDE has customizable interface with enhanced windows and editors. The Virtual File System is the physical location (file path) you are working in. It is displayed as the Workspace pane containing folders and files.
The Content pane consists of two horizontal sub-panes:
The Top pane shows files in several file tabs with their content.
The Bottom Operation pane may contain several tabs showing the list of file properties, REST Service, Google Gadget or Netvibes Widget output messages, HTML, Google Gadget, ECM Template or Netvibes Widget files preview.
To show the file properties tab, click
on the toolbar or go to View --> Properties.
To show the file preview, go to Run --> Show Preview from the top menu.
These panes are divided by the Horizontal Resize bar. Also, both Workspace pane and Content pane are divided by the Vertical Resize bar and the Vertical Resize bar.
At the right column are the Outline pane and Version pane:
The Outline pane enables you to access tags, variables, functions and other file elements quickly.
The Version pane is to navigate to the file versions.
The active pane is highlighted with a blue border.
You can maximize or minimize one of the panes by clicking
at the top right corner of this panel.
You can do some basic actions, such as browsing, creating, editing, coping, renaming, uploading, downloading, moving, deleting files and folders via the toolbar or the top menu.