If you want to regenerate the Quartus project by using your **custom Quartus properties**, you may replace the provided ``Manifest.py`` with the following one and edit it accordingly. Note that this will generate ``set_global_assignment`` statements in which the first input specify the ``name`` of the property and the second input its value. As an example, we force the VHDL and Verilog input version and optimize the synthesis for speed: