In Scheduling, to mark an Estimate as consecutive from the schedule, right-click its card and then select the Consecutive check box.
Consecutive Estimates automatically adjust their Commence Date and time based on changes to the Complete Date of the Estimate or voyage above it. They also react to changes to a TC contract's delivery date, if there are not any voyages yet on the TC.
All Estimates created via drag and drop from the Cargo Book are automatically marked as consecutive.