Place Scans Auto uses the full automatic features of SCENE to place all scans within the affected Scan folder (correspondence search based on the geometric relations + place sans).
Forced by manual target names is using the target names to assign correspondences instead of the geometric relations between the targets of different scans. The rest is the same as Place Scans Auto.
Place Cluster does only place the clusters relative to each other without affection the positions of the scans within these clusters.
Keywords: update, scans, cluster, scanmanager, manager, update, registration, location, target, names, manual, force, auto, place