To get Schengen visa for Portugal being in Montreal first of all you need to book your visa interview appointment at http://schengen.visacenter.ca. Once there click on "Apply Online" button.
For more information including Schengen visa for Portugal application form, requirements, fees and processing timings please visit the same page: http://portugal.visacenter.ca 

For more information including visa to Portugal application form, requirements, fees and processing timings please visit: http://portugal.visacenter.ca