Import Assignments Dialog Box (Assignments Menu)
Allows you to import assignments from a Quartus Prime Settings File (.qsf) Definition, Synplify Design Constraints File (.sdc), or an FPGA Xchange-Format File (.fx) Definition.
You can also import settings from a Comma-Separated Value File (.csv), including .csv files previously exported from the Pin Planner or the Assignment Editor, and modified outside the Quartus® Prime software.
To import Synopsys Design Constraints File (.sdc) Definition into the project for use with the TimeQuest Timing Analyzer, use the TimeQuest Timing Analyzer page of the Settings dialog box.