With eXo IDE, you can navigate to any older or newer versions of the opened file.
To view the older/newer version of the opened file, click
or
on the toolbar, or select View --> Older Version/Newer Version from the top menu. If there is no newer/older version, the View Newer Version/View Older Version command will be disabled respectively.
View another version from the versions history
1. Click
on the toolbar;
Or, select View --> Version... from the top menu.
2. Select the target version.
3. Click Open or double-click the version item.

Versions are listed in the reverse order, with the latest version first.