Leaders and are used to add call outs to your drawings. You can create leaders through an annotative dimension style and multileaders through an annotative multileader style.
When you create a leader, you create two separate objects: the leader and the text, block, or tolerance associated with the leader. When you create a multileader, you create a single object.
If the multileader style is annotative, the associated text or tolerance will be annotative as well, regardless of the annotative setting of the text style or tolerance.
Blocks used with annotative leaders must be annotative as well. Blocks used with annotative multileaders can be nonannotative.
You can also change the Annotative property of leaders and multileaders in the Properties palette.