Just clicking on the graphical representation of an item makes it the currently selected item. Classes, associations, roles, isa relationships, even single links from axioms and isas are selectable in this way. The browser can also be used to select classes and association, either by clicking on the tree representation or by using the search function. Projects and schemas are selected also by clicking on the respective panels.
It is possible to select a set of items. You can add an item to the currently selected set just by selecting single items while maintaining the shift key pressed, or by including them in a dragging rectangle. The selected group of items can be used as arguments for the visual functions (see section 7), for multiple deletion, or for moving the whole group just by dragging one of the selected items.