In the "Properties" view the properties of the currently selected statement in the "Outline" view are shown. In here you can change the properties by entering the needed value into the Value field of the corresponding property. If the properties of an element are changed, the "Outline" view is updated and the changes are also displayed in here.
Per default the category of the element is displayed at the top of the "Properties" view ("Execution", "Set", "Validation" etc.). If you do not need this information, you can switch this off (and on again) by clicking the "Show Categories" button.
Each element has advanced properties, which are not shown per default. You can switch to the advanced properties by clicking the "Show Advanced Properties" button.