Multileaders are added to a drawing when custom information is needed; instead of relying on dimensions, you need to put in your own values. As an example, here, we have a subassembly where different parts are labelled using multileaders:
Fig 6.88: Parts of an assembly labeled with multileaders
In this section, we will learn to create a multileader style and then use that multileader style to label different parts of the subassembly shown in the preceding example.