SmartTime Constraints Editor is an interface in the Designer software that enables you to view and edit timing constraints. Use this editor to view, edit, and create timing constraints used by the SmartTime timing analysis and timing-driven optimization tools. The editor includes powerful visual dialogs that guide you toward capturing your timing requirements and timing exceptions quickly and correctly. The editor is also closely connected to the analysis view of SmartTime (SmartTime Timing Analyzer) that enables you to quickly analyze the impact of constraint changes.