Partial legs (scan at the gate, finish after landing)
Scan OUT/OFF before pushback and ON/IN after landing - OOOIPilot merges them into one flight, no duplicate.
Scanned OUT/OFF before pushback and ON/IN aren't set yet? Save it - the leg is marked open.
After you land, scan the completed OOOI page and OOOIPilot merges ON/IN into the same leg automatically. No duplicates.