The details view will display the functions/content of the selected tab. In this case, the Inputs & Scenes tab. For some of the tabs, you will find a dropdown menu where you can add more items. Items that have been added will be listed below the dropdown menu.

Items in the list can be collapsed/expanded by using the yellow up/down arrow on the left side of the tab.

For items added in the Inputs & Scenes, Operators, or Targets tab view, you will find editable properties, read-only properties, and different types of buttons used to interact with the item. 

To delete an item from a list, select the top row of the item and press the DELETE KEY.

In the Operators and the Target views, you can re-order the items by drag-and-drop.

To change the display name of an item, double-click on the name found next to the yellow arrow.

More details on Inputs & Scenes in a later chapter.