Display-label mode means operator references like L14 resolve by label identity, not by array position. This prevents wrong-entity selection after deletions.
Display-label mode is the operator-reference interpretation where bare numbers are normalized to typed labels. For example, entering "14" in a line field is interpreted as "L14" — and L14 is resolved by finding the entity with that exact label, not by looking at array position 14.
This was a critical architectural fix in XyzPilot. Previously, some workflows parsed labels like L14 into numbers and used those numbers as array indexes. After deletions, this produced off-by-one selection and wrong-entity mutation.