[[id:b7b07a14-5dbb-48ed-9d9d-70df49e83231][Heading]]

Non-nil means storing a link to an Org file will use entry IDs.

The variable can have the following values:

t     Create an ID if needed to make a link to the current entry.

create-if-interactive
      If ‘org-store-link’ is called directly (interactively, as a user
      command), do create an ID to support the link.  But when doing the
      job for capture, only use the ID if it already exists.  The
      purpose of this setting is to avoid proliferation of unwanted
      IDs, just because you happen to be in an Org file when you
      call ‘org-capture’ that automatically and preemptively creates a
      link.  If you do want to get an ID link in a capture template to
      an entry not having an ID, create it first by explicitly creating
      a link to it, using ‘C-c l’ first.

create-if-interactive-and-no-custom-id
      Like create-if-interactive, but do not create an ID if there is
      a CUSTOM_ID property defined in the entry.

use-existing
      Use existing ID, do not create one.

nil   Never use an ID to make a link, instead link using a text search for
      the headline text.

You can customize this variable.