In order to make an annotation, you first have to select a time interval. ELAN supports the following options:
making and saving a selection on an independent tier (Section 5.6.1);
making and saving a selection on an independent tier while playing (Section 5.6.2);
making and saving a selection on a referring tier (Section 5.6.4);
deselecting a selection (Section 5.6.5);
changing the time alignment of an existing selection (Section 5.6.6);
activating and deactivating the Bulldozer mode (Section 5.6.8).