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.
Note:
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.