Select All: by clicking on this option all the entities of all the diagrams present in the central panel will be highlighted (i.e. they will be sorrounded by a blue, dotted line).

Select Related: if you select one entity and then choose this option, all the entities somehow related to the one selected will be hightlighted.

Expand Selection: if you select one entity and then choose this option, only the entities immediately related to the one selected will be highlighted.

Deselect All: this option is for deselecting the entities, or the relations between entities, which were previously selected.

Recalculate the Diagram: this option allows you to partially modify, or totally recreate, a diagram. Once selected you are allowed to add: new entities (in the standard diagram), new constraints to new or already existing entities (in the freeform and in the query diagrams), new kin terms and kin groups (in the kin terms, but also in the freeform, diagram).