To group selected objects in the left-hand editing panel, what icon must be clicked?

The process of grouping selected objects in the left-hand editing panel is facilitated by clicking on the Group icon. This icon allows users to combine multiple objects into a single entity, making it easier to move, resize, or manipulate them as one unit. Grouping is particularly useful when working with complex layouts, as it streamlines the editing process and helps maintain consistent positioning and alignment of the objects involved.

In contrast, the other icons serve different purposes. The Merge icon typically combines overlapping shapes into a single shape, which differs from grouping. The Select icon is used for selecting individual objects but does not perform any grouping action. The Align icon is focused on arranging objects in relation to each other but does not combine them into a single editable unit. Understanding these differences solidifies the importance of the Group icon in effective diagramming and organization within the editing panel.