How missing dates are estimated

What it does. A bar needs a start and an end. Where a date is missing,

TreeLine works one out from what is recorded nearby — parents, brothers

and sisters, children, marriages — and draws the bar from that estimate.

How sure it is. Open TreeLine Info › Date Estimation to see each

estimate with its confidence (High, Medium or Low) and a note on

what it was based on.

No death date. For someone with no recorded death, TreeLine assumes a

lifespan. TreeLine Settings › People and labels › Assumed lifespan

sets it in years; left blank (auto), it follows this Family's own

recorded lifespans around that person's era.

What to expect. An estimate only places the bar: your Family's dates

are never changed. With Fading estimated dates on, the fill softens

toward an estimated end. Adding even a rough recorded year replaces the

estimate.