...
1) Conduct a search from the Persistent search bar, select and bring results into editors
2) When you already have a bib record open in the editor, get its holdings/item record; or vice versa
3) Browse by call number via Browse Shelf Listing and open records from the results list
4) Browse by name, title, etc. via Browse Bibliographic Headings and open records from the results list. Due to a number of known issues with this feature, please apply this method at your discretion.
...
An example of related records is the host bib of bound-with items. Its title follows the pattern of -
...
begins with the phrase "Multi-title collection including"
Source: Ex Libris Knowledge Center > Configuring Related Records for Physical Inventory