Where Budget › Scheduling tab › Save baseline

Steps
- Schedule the project and save the Gantt.
- In the budget's Scheduling tab click Save baseline.
- The new baseline goes into Compare With. You can save several (before and after a design change) and choose which one to compare with by clicking Compare in the list.
- In the Gantt the Baseline button shows the saved dates in grey under each bar.
Site note
Rename the baseline in the list itself (for example "Contract" or "Change order 1").