The Property Window is used with vector layers. The window is divided into the following parts.
Layer name - You can select an available layer from the drop-down menu
Download - Will download the selected layer as shapefile
Filter - You can filter the attributes. By default, it is shown all attributes.
List - Attribute list
Add - Adds new feature into shapefile
Remove - Remove feature from the shapefile
Copy - copy existing feature with all asighned attributes and creates new one
Attribute List - List of attributes assigned for the feature