When you are logged into the Case List in iinsight there are 2 View Options:
Full-Screen View of Case List:
The Full-Screen Case List view is achieved by selecting the button on the left marked with the arrow below:
The Wide Right-Hand Side Case List View (Split Case List)
The Wide Right-Hand Side Case List View (Split Case List) is available by selecting the button on the right marked with the arrow as per the example below:
