This tool provides an alternate way of editing Themes. By enabling/ disabling a check box in the Category Filters group or the Property Type Filter group, you can easily add/ reduce a group of properties in the theme.
You can also right-click on a property or a branch of the tree, then choose Delete from shortcut menu to delete it. You can right-click on the icon of a folder (the "tree node") to select the Add from the context menu to add more properties/branches to the tree. After you've deleted or added a property, the Total Number above this table will be updated automatically.
In addition, you can use the shortcut menu to expand or collapse the selected node.