You can group multiple objects that belong together and then modify them as if they were a single object. Please note that an object can only belong to one group. It is therefore not possible to combine groups to a higher-level group.
§ In order to make a group of two or more objects, select the objects in question and then choose Group in the context menu.
§ To edit a grouped object, hold down the ALT-key when selecting the object.
§ To remove the grouping, choose the item Ungroup.