The bottom of the window displays the complete list of constraints loaded in memory, in the same sequence as they were applied. The constraints are grouped in accordance with the XDC file or the Tcl script from which they originated. When an XDC file is scoped to a particular hierarchical cell, the cell name is displayed next to the file name.
You can expand and collapse the constraints for each associated source file, or completely by clicking the two corresponding buttons on the left side of the panel.
De-select the Group by Source icon to switch the view to a table in which the source constraint file and the scoped cell information appears in the two right columns.
- To delete a constraint, select it and click X.
- To edit a constraint that is not read-only, use the spreadsheet view. After your changes have been registered by the tool, you must click Apply to refresh the constraints in memory.
- To add new constraints, use the dialog boxes as previously described, or type the constraints in the Tcl Console. The new constraint appears at the end of the list in a group named <unsaved_constraints>.
When saving the constraints, the new constraints are saved at the end of the XDC file marked as target. If there is no target XDC file in the constraint set associated with the design in memory, or if there is only a Tcl script in the constraint set, you are prompted to specify where to save the constraints.
Regularly save your constraints. Click Save, or select .