"Delete" in the group "Edit" of the tab "Home" deletes the row selected in the tree, after the question "Are you sure you want to delete this item?". The `Delete` key does the same while the tree has the focus. After the delete the folder of the row is read again. A folder cannot be deleted; Invantive Studio reports "You can not delete a list.". Without the right to change the row, it reports "Delete is not allowed.". The business layer checks the delete as well and refuses it when a rule forbids it, for instance when other rows still refer to the row.