- Most discrete-selection systems implement mutual exclusion by default and allow additive selection only by using a meta-key.
- In most cases this mapping adds confusion, because it conflicts with the common idiom for discrete additive selection.
- However, if there is no mutual exclusion for interactions involving discrete selection, a user can select many independent objects by clicking on them sequentially, in what is called additive selection.
- That shop has a fine selection of cakes.
- That store has a good selection of furniture.
- The selection was weighted against me.